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Saito S, Suzuki K, Ohtani R, Maki T, Kowa H, Tachibana H, Washida K, Kawabata N, Mizuno T, Kanki R, Sudoh S, Kitaguchi H, Shindo K, Shindo A, Oka N, Yamamoto K, Yasuno F, Kakuta C, Kakuta R, Yamamoto Y, Hattori Y, Takahashi Y, Nakaoku Y, Tonomura S, Oishi N, Aso T, Taguchi A, Kagimura T, Kojima S, Taketsuna M, Tomimoto H, Takahashi R, Fukuyama H, Nagatsuka K, Yamamoto H, Fukushima M, Ihara M. Efficacy and Safety of Cilostazol in Mild Cognitive Impairment: A Randomized Clinical Trial. JAMA Netw Open 2023; 6:e2344938. [PMID: 38048134 PMCID: PMC10696485 DOI: 10.1001/jamanetworkopen.2023.44938] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Accepted: 10/15/2023] [Indexed: 12/05/2023] Open
Abstract
Importance Recent evidence indicates the efficacy of β-amyloid immunotherapy for the treatment of Alzheimer disease, highlighting the need to promote β-amyloid removal from the brain. Cilostazol, a selective type 3 phosphodiesterase inhibitor, promotes such clearance by facilitating intramural periarterial drainage. Objective To determine the safety and efficacy of cilostazol in mild cognitive impairment. Design, Setting, and Participants The COMCID trial (A Trial of Cilostazol for Prevention of Conversion from Mild Cognitive Impairment to Dementia) was an investigator-initiated, double-blind, phase 2 randomized clinical trial. Adult participants were registered between May 25, 2015, and March 31, 2018, and received placebo or cilostazol for up to 96 weeks. Participants were treated in the National Cerebral and Cardiovascular Center and 14 other regional core hospitals in Japan. Patients with mild cognitive impairment with Mini-Mental State Examination (MMSE) scores of 22 to 28 points (on a scale of 0 to 30, with lower scores indicating greater cognitive impairment) and Clinical Dementia Rating scores of 0.5 points (on a scale of 0, 0.5, 1, 2, and 3, with higher scores indicating more severe dementia) were enrolled. The data were analyzed from May 1, 2020, to December 1, 2020. Interventions The participants were treated with placebo, 1 tablet twice daily, or cilostazol, 50 mg twice daily, for up to 96 weeks. Main Outcomes and Measures The primary end point was the change in the total MMSE score from baseline to the final observation. Safety analyses included all adverse events. Results The full analysis set included 159 patients (66 [41.5%] male; mean [SD] age, 75.6 [5.2] years) who received placebo or cilostazol at least once. There was no statistically significant difference between the placebo and cilostazol groups for the primary outcome. The least-squares mean (SE) changes in the MMSE scores among patients receiving placebo were -0.1 (0.3) at the 24-week visit, -0.8 (0.3) at 48 weeks, -1.2 (0.4) at 72 weeks, and -1.3 (0.4) at 96 weeks. Among those receiving cilostazol, the least-squares mean (SE) changes in MMSE scores were -0.6 (0.3) at 24 weeks, -1.0 (0.3) at 48 weeks, -1.1 (0.4) at 72 weeks, and -1.8 (0.4) at 96 weeks. Two patients (2.5%) in the placebo group and 3 patients (3.8%) in the cilostazol group withdrew owing to adverse effects. There was 1 case of subdural hematoma in the cilostazol group, which may have been related to the cilostazol treatment; the patient was successfully treated surgically. Conclusions and Relevance In this randomized clinical trial, cilostazol was well tolerated, although it did not prevent cognitive decline. The efficacy of cilostazol should be tested in future trials. Trial Registration ClinicalTrials.gov Identifier: NCT02491268.
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Affiliation(s)
- Satoshi Saito
- Department of Neurology, National Cerebral and Cardiovascular Center, Suita, Japan
| | - Keisuke Suzuki
- Innovation Center for Translational Research, National Center for Geriatrics and Gerontology, Obu, Japan
| | - Ryo Ohtani
- Department of Neurology, National Hospital Organization Kyoto Medical Center, Kyoto, Japan
| | - Takakuni Maki
- Department of Neurology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Hisatomo Kowa
- Division of Neurology, Kobe University Hospital, Kobe, Japan
| | | | - Kazuo Washida
- Department of Neurology, National Cerebral and Cardiovascular Center, Suita, Japan
| | | | - Toshiki Mizuno
- Department of Neurology, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Rie Kanki
- Department of Neurology, Osaka City General Hospital, Osaka, Japan
| | - Shinji Sudoh
- Department of Neurology, National Hospital Organization, Utano National Hospital, Kyoto, Japan
| | - Hiroshi Kitaguchi
- Department of Neurology, Kurashiki Central Hospital, Kurashiki, Japan
| | - Katsuro Shindo
- Department of Neurology, Kurashiki Central Hospital, Kurashiki, Japan
| | - Akihiro Shindo
- Department of Neurology, Graduate School of Medicine, Mie University, Tsu, Japan
| | - Nobuyuki Oka
- Department of Neurology, National Hospital Organization Minami Kyoto Hospital, Joyo, Japan
| | - Keiichi Yamamoto
- Internal Medicine and Neurology, Nara Midori Clinic, Nara, Japan
| | - Fumihiko Yasuno
- Department of Psychiatry, National Center for Geriatrics and Gerontology, Obu, Japan
| | - Chikage Kakuta
- Department of Neurology, National Cerebral and Cardiovascular Center, Suita, Japan
| | - Ryosuke Kakuta
- Department of Data Science, National Cerebral and Cardiovascular Center, Suita, Japan
| | - Yumi Yamamoto
- Department of Molecular Innovation in Lipidemiology, National Cerebral and Cardiovascular Center, Suita, Japan
| | - Yorito Hattori
- Department of Neurology, National Cerebral and Cardiovascular Center, Suita, Japan
| | - Yukako Takahashi
- Department of Neurology, National Cerebral and Cardiovascular Center, Suita, Japan
| | - Yuriko Nakaoku
- Department of Neurology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Shuichi Tonomura
- Department of Neurology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Naoya Oishi
- Department of Psychiatry, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Toshihiko Aso
- Laboratory for Brain Connectomics Imaging, RIKEN Center for Biosystems Dynamics Research, Kobe, Japan
| | - Akihiko Taguchi
- Department of Regenerative Medicine Research, Institute of Biomedical Research and Innovation, Kobe, Japan
| | - Tatsuo Kagimura
- Translational Research Center for Medical Innovation, Foundation for Biomedical Research and Innovation at Kobe, Kobe, Japan
| | - Shinsuke Kojima
- Translational Research Center for Medical Innovation, Foundation for Biomedical Research and Innovation at Kobe, Kobe, Japan
| | - Masanori Taketsuna
- Translational Research Center for Medical Innovation, Foundation for Biomedical Research and Innovation at Kobe, Kobe, Japan
| | - Hidekazu Tomimoto
- Department of Neurology, Graduate School of Medicine, Mie University, Tsu, Japan
| | - Ryosuke Takahashi
- Department of Neurology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Hidenao Fukuyama
- Research and Educational Unit of Leaders for Integrated Medical System, Kyoto University, Kyoto, Japan
| | - Kazuyuki Nagatsuka
- Department of Neurology, National Cerebral and Cardiovascular Center, Suita, Japan
| | - Haruko Yamamoto
- Department of Data Science, National Cerebral and Cardiovascular Center, Suita, Japan
| | | | - Masafumi Ihara
- Department of Neurology, National Cerebral and Cardiovascular Center, Suita, Japan
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Takahashi Y, Oishi N, Yamao Y, Kunieda T, Kikuchi T, Fukuyama H, Miyamoto S, Arakawa Y. Voxel-based clustered imaging by multiparameter diffusion tensor images for predicting the grade and proliferative activity of meningioma. Brain Behav 2023; 13:e3201. [PMID: 37644780 PMCID: PMC10570481 DOI: 10.1002/brb3.3201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 07/18/2023] [Accepted: 07/22/2023] [Indexed: 08/31/2023] Open
Abstract
INTRODUCTION Meningiomas are the most common primary central nervous system tumors. Predicting the grade and proliferative activity of meningiomas would influence therapeutic strategies. We aimed to apply the multiple parameters from preoperative diffusion tensor images for predicting meningioma grade and proliferative activity. METHODS Nineteen patients with low-grade meningiomas and eight with high-grade meningiomas were included. For the prediction of proliferative activity, the patients were divided into two groups: Ki-67 monoclonal antibody labeling index (MIB-1 LI) < 5% (lower MIB-1 LI group; n = 18) and MIB-1 LI ≥ 5% (higher MIB-1 LI group; n = 9). Six features, diffusion-weighted imaging, fractional anisotropy, mean, axial, and radial diffusivities, and raw T2 signal with no diffusion weighting, were extracted as multiple parameters from diffusion tensor imaging. The two-level clustering approach for a self-organizing map followed by the K-means algorithm was applied to cluster a large number of input vectors with the six features. We also validated whether the diffusion tensor-based clustered image (DTcI) was helpful for predicting preoperative meningioma grade or proliferative activity. RESULTS The sensitivity, specificity, accuracy, and area under the curve of receiver operating characteristic curves from the 16-class DTcIs for differentiating high- and low-grade meningiomas were 0.870, 0.901, 0.891, and 0.959, and those from the 10-class DTcIs for differentiating higher and lower MIB-1 LIs were 0.508, 0.770, 0.683, and 0.694, respectively. The log-ratio values of class numbers 13, 14, 15, and 16 were significantly higher in high-grade meningiomas than in low-grade meningiomas (p < .001). With regard to MIB-1 LIs, the log-ratio values of class numbers 8, 9, and 10 were higher in meningiomas with higher MIB-1 groups (p < .05). CONCLUSION The multiple diffusion tensor imaging-based parameters from the voxel-based DTcIs can help differentiate between low- and high-grade meningiomas and between lower and higher proliferative activities.
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Affiliation(s)
- Yuki Takahashi
- Department of NeurosurgeryKyoto University Graduate School of MedicineKyotoJapan
- Human Brain Research CenterKyoto University Graduate School of MedicineKyotoJapan
| | - Naoya Oishi
- Department of PsychiatryKyoto University Graduate School of MedicineKyotoJapan
| | - Yukihiro Yamao
- Department of NeurosurgeryKyoto University Graduate School of MedicineKyotoJapan
- Human Brain Research CenterKyoto University Graduate School of MedicineKyotoJapan
| | - Takeharu Kunieda
- Department of NeurosurgeryEhime University Graduate School of MedicineToonJapan
| | - Takayuki Kikuchi
- Department of NeurosurgeryKyoto University Graduate School of MedicineKyotoJapan
| | | | - Susumu Miyamoto
- Department of NeurosurgeryKyoto University Graduate School of MedicineKyotoJapan
- Stroke Support CenterKyoto University HospitalKyotoJapan
- Momoya Disease Support CenterKyoto University HospitalKyotoJapan
| | - Yoshiki Arakawa
- Department of NeurosurgeryKyoto University Graduate School of MedicineKyotoJapan
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Yamao Y, Sawamoto N, Kunieda T, Inano R, Shibata S, Kikuchi T, Arakawa Y, Yoshida K, Matsumoto R, Ikeda A, Takahashi R, Fukuyama H, Miyamoto S. Changes in Distributed Motor Network Connectivity Correlates With Functional Outcome After Surgical Resection of Brain Tumors. Neurosurgery Open 2023. [DOI: 10.1227/neuprac.0000000000000028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
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Asada T, Iwata M, Matsuzaki S, Hamakawa H, Sengan S, Noguchi T, Daimon K, Matsumura N, Shibasaki M, Tsujimoto T, Ooi K, Fukuyama H. Hypercalcemia and hyperphosphatemia associated with 25-OH vitamin D deficiency in an alcoholic patient with normal renal function. Journal of Clinical and Translational Endocrinology: Case Reports 2022. [DOI: 10.1016/j.jecr.2022.100107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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Hamada M, Matsubayashi J, Tanaka K, Furuya M, Matsuhashi M, Mima T, Fukuyama H, Mitani A. People with High Empathy Show Increased Cortical Activity around the Left Medial Parieto-Occipital Sulcus after Watching Social Interaction of On-Screen Characters. Cereb Cortex 2022; 32:3581-3601. [DOI: 10.1093/cercor/bhab435] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Revised: 11/03/2021] [Accepted: 11/05/2021] [Indexed: 12/30/2022] Open
Abstract
Abstract
People with high empathy interpret others’ mental states in daily social interactions. To investigate their characteristics of social cognitive processing, we compared neuromagnetic activities between 20 males with high empathy and 23 males with low empathy while watching social interactions between two characters. Twenty stories of four-panel comic strips were presented; the first three panels described social interactions, and the last panel described empathic/nonempathic behaviors. People with high empathy exhibited increased cortical activity in the right occipital region, medial part of the bilateral superior frontal gyri, and right posterior insula while watching social interaction scenes, which suggests that they paid attention to others’ faces and bodies, and inferred others’ mental states. They also exhibited increased cortical activity in the left superior frontal gyrus while watching empathic behaviors. Moreover, they exhibited increased cortical activity in the region around the left medial parieto-occipital sulcus, which is related to self-projection, while passively watching both empathic and nonempathic endings. Taken together, these results suggest that people with high empathy pay attention to others and actively infer others’ mental states while watching social interactions and that they reconstruct others’ mental states and intentions through self-projection after watching a sequence of others’ behaviors.
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Zhang Z, Gao C, Zhao S, Wu J, Fukuyama H, Murai T. Salient Properties in Bimanual Haptic Volume Perception: Influence of Object Shape, Finger Pair, and Schizotypal Personality Traits. IEEE Trans Haptics 2021; 14:816-824. [PMID: 33961565 DOI: 10.1109/toh.2021.3077882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Bimanual haptic volume perception refers to somatosensory access to volume information through both hands, and the characteristics that influence this perception remain unclear. This article investigated the influence of target object shapes and finger pairs on bimanual haptic perception; in addition, associations of bimanual haptic impairment and schizotypal features in nonpsychotic individuals were investigated. Twenty blindfolded participants bimanually discriminated volume variations in regular solid objects under different shape (tetrahedron, cube, or sphere) and finger pair (high- or low-sensitivity pairs) conditions using a newly developed bimanual haptic volume presentation device. Discrimination thresholds were then associated with schizotypal traits using the Chinese version of the Schizotypal Personality Questionnaire. Target object shape and finger pairs significantly influenced bimanual haptic volume perception. Volume discrimination thresholds were significantly higher with the tetrahedron stimuli than the cubic or spherical stimuli in high-sensitivity pair conditions, but no significant differences among shapes were found in low-sensitivity pair conditions. Moreover, volume discrimination thresholds with high-sensitivity pairs were correlated with the paranoid score of the schizotypal personality questionnaire. The findings provide initial evidence toward understanding the nature of bimanual haptic volume perception, including the properties of objects, individuals, and object-individual interfaces.
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Liao YP, Urayama SI, Isa T, Fukuyama H. Optimal Model Mapping for Intravoxel Incoherent Motion MRI. Front Hum Neurosci 2021; 15:617152. [PMID: 33692677 PMCID: PMC7937866 DOI: 10.3389/fnhum.2021.617152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Accepted: 01/11/2021] [Indexed: 11/30/2022] Open
Abstract
In general, only one diffusion model would be applied to whole field-of-view voxels in the intravoxel incoherent motion-magnetic resonance imaging (IVIM-MRI) study. However, the choice of the applied diffusion model can significantly influence the estimated diffusion parameters. The quality of the diffusion analysis can influence the reliability of the perfusion analysis. This study proposed an optimal model mapping method to improve the reliability of the perfusion parameter estimation in the IVIM study. Six healthy volunteers (five males and one female; average age of 38.3 ± 7.5 years). Volunteers were examined using a 3.0 Tesla scanner. IVIM-MRI of the brain was applied at 17 b-values ranging from 0 to 2,500 s/mm2. The Gaussian model, the Kurtosis model, and the Gamma model were found to be optimal for the CSF, white matter (WM), and gray matter (GM), respectively. In the mean perfusion fraction (fp) analysis, the GM/WM ratios were 1.16 (Gaussian model), 1.80 (Kurtosis model), 1.94 (Gamma model), and 1.54 (Optimal model mapping); in the mean pseudo diffusion coefficient (D*) analysis, the GM/WM ratios were 1.18 (Gaussian model), 1.19 (Kurtosis model), 1.56 (Gamma model), and 1.24 (Optimal model mapping). With the optimal model mapping method, the estimated fp and D* were reliable compared with the conventional methods. In addition, the optimal model maps, the associated products of this method, may provide additional information for clinical diagnosis.
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Affiliation(s)
- Yen-Peng Liao
- Division of Neurobiology and Physiology, Department of Neuroscience, Graduate School of Medicine in Kyoto University, Kyoto, Japan.,Human Brain Research Center, Graduate School of Medicine in Kyoto University, Kyoto, Japan
| | - Shin-Ichi Urayama
- Division of Neurobiology and Physiology, Department of Neuroscience, Graduate School of Medicine in Kyoto University, Kyoto, Japan.,Human Brain Research Center, Graduate School of Medicine in Kyoto University, Kyoto, Japan
| | - Tadashi Isa
- Division of Neurobiology and Physiology, Department of Neuroscience, Graduate School of Medicine in Kyoto University, Kyoto, Japan.,Human Brain Research Center, Graduate School of Medicine in Kyoto University, Kyoto, Japan.,Faculty of Medicine, Institute for the Advanced Study of Human Biology (ASHBi), Kyoto University, Kyoto, Japan
| | - Hidenao Fukuyama
- Human Brain Research Center, Graduate School of Medicine in Kyoto University, Kyoto, Japan.,Department of Rehabilitation Medicine, Graduate School of Medicine, Nagoya City University, Nagoya, Japan
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Zhang Z, Guo G, Zhang J, Li C, Huang Q, Go R, Fukuyama H, Funahashi S, Yan T, Wu J. Corrigendum to "Do theta oscillations explain the somatosensory change detection mechanism?" Biol. Psychol. 143 (2019) April 103-112. Biol Psychol 2021; 159:107995. [PMID: 33509686 DOI: 10.1016/j.biopsycho.2020.107995] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Zhilin Zhang
- Intelligent Robotics Institute, School of Mechatronical Engineering, Beijing Institute of Technology, Beijing, China; Department of Psychiatry, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Guoxin Guo
- School of Life Science, Beijing Institute of Technology, Beijing, China
| | - Jian Zhang
- Intelligent Robotics Institute, School of Mechatronical Engineering, Beijing Institute of Technology, Beijing, China
| | - Chunlin Li
- School of Biomedical Engineering, Capital Medical University, Beijing, China
| | - Qiang Huang
- Intelligent Robotics Institute, School of Mechatronical Engineering, Beijing Institute of Technology, Beijing, China; International Joint Research Laboratory of Biomimetic Robots and Systems, Ministry of Education, Beijing, China
| | - Ritsu Go
- Intelligent Robotics Institute, School of Mechatronical Engineering, Beijing Institute of Technology, Beijing, China; Key Laboratory of Biomimetic Robots and Systems, Ministry of Education, Beijing, China
| | - Hidenao Fukuyama
- Intelligent Robotics Institute, School of Mechatronical Engineering, Beijing Institute of Technology, Beijing, China; Research and Educational Unit of Leaders for Integrated Medical System, Center for the Promotion of Interdisciplinary Education and Research, Kyoto University, Kyoto, Japan
| | - Shintaro Funahashi
- Advanced Research Institute for Multidisciplinary Science, Beijing Institute of Technology, Beijing, China
| | - Tianyi Yan
- School of Life Science, Beijing Institute of Technology, Beijing, China.
| | - Jinglong Wu
- Intelligent Robotics Institute, School of Mechatronical Engineering, Beijing Institute of Technology, Beijing, China; Key Laboratory of Biomimetic Robots and Systems, Ministry of Education, Beijing, China
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Aso T, Sugihara G, Murai T, Ubukata S, Urayama SI, Ueno T, Fujimoto G, Thuy DHD, Fukuyama H, Ueda K. A venous mechanism of ventriculomegaly shared between traumatic brain injury and normal ageing. Brain 2021; 143:1843-1856. [PMID: 32372102 PMCID: PMC7296851 DOI: 10.1093/brain/awaa125] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Revised: 02/18/2020] [Accepted: 03/01/2020] [Indexed: 11/15/2022] Open
Abstract
Recently, age-related timing dissociation between the superficial and deep venous systems has been observed; this was particularly pronounced in patients with normal pressure hydrocephalus, suggesting a common mechanism of ventriculomegaly. Establishing the relationship between venous drainage and ventricular enlargement would be clinically relevant and could provide insight into the mechanisms underlying brain ageing. To investigate a possible link between venous drainage and ventriculomegaly in both normal ageing and pathological conditions, we compared 225 healthy subjects (137 males and 88 females) and 71 traumatic brain injury patients of varying ages (53 males and 18 females) using MRI-based volumetry and a novel perfusion-timing analysis. Volumetry, focusing on the CSF space, revealed that the sulcal space and ventricular size presented different lifespan profiles with age; the latter presented a quadratic, rather than linear, pattern of increase. The venous timing shift slightly preceded this change, supporting a role for venous drainage in ventriculomegaly. In traumatic brain injury, a small but significant disease effect, similar to idiopathic normal pressure hydrocephalus, was found in venous timing, but it tended to decrease with age at injury, suggesting an overlapping mechanism with normal ageing. Structural bias due to, or a direct causative role of ventriculomegaly was unlikely to play a dominant role, because of the low correlation between venous timing and ventricular size after adjustment for age in both patients and controls. Since post-traumatic hydrocephalus can be asymptomatic and occasionally overlooked, the observation suggested a link between venous drainage and CSF accumulation. Thus, hydrocephalus, involving venous insufficiency, may be a part of normal ageing, can be detected non-invasively, and is potentially treatable. Further investigation into the clinical application of this new marker of venous function is therefore warranted.
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Affiliation(s)
- Toshihiko Aso
- Department of Psychiatry, Kyoto University Graduate School of Medicine, Kyoto, Japan.,Laboratory for Brain Connectomics Imaging, RIKEN Center for Biosystems Dynamics Research, Kobe, Japan.,Human Brain Research Center, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Genichi Sugihara
- Department of Psychiatry, Kyoto University Graduate School of Medicine, Kyoto, Japan.,Department of Psychiatry and Behavioral Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Toshiya Murai
- Department of Psychiatry, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Shiho Ubukata
- Department of Psychiatry, Kyoto University Graduate School of Medicine, Kyoto, Japan.,Medical Innovation Center, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Shin-Ichi Urayama
- Human Brain Research Center, Kyoto University Graduate School of Medicine, Kyoto, Japan.,Research and Educational Unit of Leaders for Integrated Medical System, Center for the Promotion of Interdisciplinary Education and Research, Kyoto University, Kyoto, Japan
| | - Tsukasa Ueno
- Department of Psychiatry, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Gaku Fujimoto
- Department of Psychiatry, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Dinh Ha Duy Thuy
- Human Brain Research Center, Kyoto University Graduate School of Medicine, Kyoto, Japan.,Research and Educational Unit of Leaders for Integrated Medical System, Center for the Promotion of Interdisciplinary Education and Research, Kyoto University, Kyoto, Japan
| | - Hidenao Fukuyama
- Human Brain Research Center, Kyoto University Graduate School of Medicine, Kyoto, Japan.,Research and Educational Unit of Leaders for Integrated Medical System, Center for the Promotion of Interdisciplinary Education and Research, Kyoto University, Kyoto, Japan
| | - Keita Ueda
- Department of Psychiatry, Kyoto University Graduate School of Medicine, Kyoto, Japan
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Aso T, Sugihara G, Murai T, Ubukata S, Urayama SI, Ueno T, Fujimoto G, Thuy DHD, Fukuyama H, Ueda K. Reply: A transvenous pressure gradient mechanism behind ventriculomegaly. Brain 2020; 143:e75. [PMID: 32945879 DOI: 10.1093/brain/awaa271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- Toshihiko Aso
- Department of Psychiatry, Kyoto University Graduate School of Medicine, Kyoto, Japan.,Laboratory for Brain Connectomics Imaging, RIKEN Center for Biosystems Dynamics Research, Kobe, Japan.,Human Brain Research Center, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Genichi Sugihara
- Department of Psychiatry, Kyoto University Graduate School of Medicine, Kyoto, Japan.,Department of Psychiatry and Behavioral Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Toshiya Murai
- Department of Psychiatry, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Shiho Ubukata
- Department of Psychiatry, Kyoto University Graduate School of Medicine, Kyoto, Japan.,Medical Innovation Center, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Shin-Ichi Urayama
- Human Brain Research Center, Kyoto University Graduate School of Medicine, Kyoto, Japan.,Research and Educational Unit of Leaders for Integrated Medical System, Center for the Promotion of Interdisciplinary Education and Research, Kyoto University, Kyoto, Japan
| | - Tsukasa Ueno
- Department of Psychiatry, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Gaku Fujimoto
- Department of Psychiatry, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Dinh Ha Duy Thuy
- Human Brain Research Center, Kyoto University Graduate School of Medicine, Kyoto, Japan.,Research and Educational Unit of Leaders for Integrated Medical System, Center for the Promotion of Interdisciplinary Education and Research, Kyoto University, Kyoto, Japan
| | - Hidenao Fukuyama
- Human Brain Research Center, Kyoto University Graduate School of Medicine, Kyoto, Japan.,Research and Educational Unit of Leaders for Integrated Medical System, Center for the Promotion of Interdisciplinary Education and Research, Kyoto University, Kyoto, Japan
| | - Keita Ueda
- Department of Psychiatry, Kyoto University Graduate School of Medicine, Kyoto, Japan
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Shindo A, Tabei KI, Taniguchi A, Nozaki H, Onodera O, Ueda A, Ando Y, Urabe T, Kimura K, Kitagawa K, Hanyu H, Hirano T, Wakita H, Fukuyama H, Kagimura T, Miyamoto Y, Takegami M, Saito S, Watanabe-Hosomi A, Mizuta I, Ihara M, Mizuno T, Tomimoto H. A Nationwide Survey and Multicenter Registry-Based Database of Cerebral Autosomal Dominant Arteriopathy With Subcortical Infarcts and Leukoencephalopathy in Japan. Front Aging Neurosci 2020; 12:216. [PMID: 32765252 PMCID: PMC7381163 DOI: 10.3389/fnagi.2020.00216] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Accepted: 06/19/2020] [Indexed: 01/16/2023] Open
Abstract
Objectives Clinical characteristics of cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy (CADASIL) include migraine, recurrent stroke, white matter lesions, and vascular dementia. CADASIL is one of the most common hereditary cerebral small vessel diseases. Clinical presentation of CADASIL varies and a racial gap may exist between the Asian and Caucasian populations. This is the first nationwide epidemiological survey which aimed to elucidate the clinical features of CADASIL in Japan. Moreover, the registration database of CADASIL was constructed. Methods Subjects included CADASIL patients who visited the hospitals (totally 1,448 hospitals) certified by the Japanese Society of Neurology and/or Japan Stroke Society in 2016. This study consisted of a two-step survey; patients with CADASIL were identified genetically by the first questionnaire, and their clinical features were assessed by the second questionnaire. Selected 6 hospitals registered the data of all CADASIL patients using a Research Electronic Data Capture (REDCap) system for the second questionnaire. Results Based on the criteria, 88 patients (50 male and 38 female) with CADASIL were enrolled. The mean age of symptom onset was 49.5 years. Sixteen (18.2%) patients had an elderly onset (>60 years). Thirteen patients (13.6%) had history of migraine with aura and 33 patients (37.5%) had vascular risk factor(s). From among the 86 patients who were examined using magnetic resonance imaging, abnormal deep white matter lesions were detected in 85 patients (98.8%), WMLs extending to anterior temporal pole in 73 patients (84.9%), and cerebral microbleeds in 41 patients (47.7%). Anti-platelet therapy was received by 65 patients (73.9%). Thirty-eight patients (43.2%) underwent treatment with lomerizine hydrochloride. Thirty-four different mutations of NOTCH3 were found in exons 2, 3, 4, 5, 6, 8, 11, 14, and 19. Most of the mutations existed in exon 4 (n = 44, 60.3%). The prevalence rate of CADASIL was 1.20 to 3.58 per 100,000 adults in Japan. Conclusion This questionnaire-based study revealed clinical features and treatment status in Japanese CADASIL patient, although it may not be an exhaustive search. We have constructed the REDCap database for these CADASIL patients.
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Affiliation(s)
- Akihiro Shindo
- Department of Neurology, Mie University Graduate School of Medicine, Tsu, Japan
| | - Ken-Ichi Tabei
- Department of Dementia Prevention and Therapeutics, Mie University Graduate School of Medicine, Tsu, Japan
| | - Akira Taniguchi
- Department of Neurology, Mie University Graduate School of Medicine, Tsu, Japan
| | - Hiroaki Nozaki
- Department of Neurology, Clinical Neuroscience Branch, Brain Research Institute, Niigata University, Niigata, Japan
| | - Osamu Onodera
- Department of Neurology, Clinical Neuroscience Branch, Brain Research Institute, Niigata University, Niigata, Japan
| | - Akihiko Ueda
- Department of Neurology, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Yukio Ando
- Department of Neurology, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan.,Department of Amyloidosis Research, Nagasaki International University, Nagasaki, Japan
| | - Takao Urabe
- Department of Neurology, Juntendo University Urayasu Hospital, Chiba, Japan
| | - Kazumi Kimura
- Department of Neurology, Graduate School of Medicine, Nippon Medical School, Tokyo, Japan
| | - Kazuo Kitagawa
- Department of Neurology, Tokyo Women's Medical University, Tokyo, Japan
| | - Haruo Hanyu
- Department of Geriatric Medicine, Tokyo Medical University, Tokyo, Japan
| | - Teruyuki Hirano
- Department of Stroke and Cerebrovascular Medicine, Kyorin University, Tokyo, Japan
| | - Hideaki Wakita
- Department of Internal Medicine, Nanakuri Memorial Hospital, Fujita Health University, Tsu, Japan
| | - Hidenao Fukuyama
- Center for the Promotion of Interdisciplinary Education and Research, Kyoto University, Kyoto, Japan
| | - Tatsuo Kagimura
- Translational Research Center for Medical Innovation, Foundation for Biomedical Research and Innovation at Kobe, Kobe, Japan
| | - Yoshihiro Miyamoto
- Center for Cerebral and Cardiovascular Disease Information, National Cerebral and Cardiovascular Center, Osaka, Japan
| | - Misa Takegami
- Department of Preventive Medicine and Epidemiologic Informatics, National Cerebral and Cardiovascular Center, Osaka, Japan
| | - Satoshi Saito
- Department of Neurology, National Cerebral and Cardiovascular Center, Suita, Japan
| | - Akiko Watanabe-Hosomi
- Department of Neurology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Ikuko Mizuta
- Department of Neurology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Masafumi Ihara
- Department of Neurology, National Cerebral and Cardiovascular Center, Suita, Japan
| | - Toshiki Mizuno
- Department of Neurology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Hidekazu Tomimoto
- Department of Neurology, Mie University Graduate School of Medicine, Tsu, Japan
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12
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Yoshinaga K, Matsuhashi M, Mima T, Fukuyama H, Takahashi R, Hanakawa T, Ikeda A. Comparison of Phase Synchronization Measures for Identifying Stimulus-Induced Functional Connectivity in Human Magnetoencephalographic and Simulated Data. Front Neurosci 2020; 14:648. [PMID: 32636735 PMCID: PMC7318889 DOI: 10.3389/fnins.2020.00648] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Accepted: 05/25/2020] [Indexed: 12/11/2022] Open
Abstract
Phase synchronization measures are widely used for investigating inter-regional functional connectivity (FC) of brain oscillations, but which phase synchronization measure should be chosen for a given experiment remains unclear. Using neuromagnetic brain signals recorded from healthy participants during somatosensory stimuli, we compared the performance of four phase synchronization measures, imaginary part of phase-locking value, imaginary part of coherency (ImCoh), phase lag index and weighted phase lag index (wPLI), for detecting stimulus-induced FCs between the contralateral primary and ipsilateral secondary somatosensory cortices. The analyses revealed that ImCoh exhibited the best performance for detecting stimulus-induced FCs, followed by the wPLI. We found that amplitude weighting, which is related to computing both ImCoh and wPLI, effectively attenuated the influence of noise contamination. A simulation study modeling noise-contaminated periodograms replicated these findings. The present results suggest that the amplitude-dependent measures, ImCoh followed by wPLI, may have the advantage in detecting stimulus-induced FCs.
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Affiliation(s)
- Kenji Yoshinaga
- Department of Neurology, Kyoto University Graduate School of Medicine, Kyoto, Japan.,Department of Advanced Neuroimaging, Integrative Brain Imaging Center, National Center of Neurology and Psychiatry, Tokyo, Japan
| | - Masao Matsuhashi
- Department of Epilepsy, Movement Disorders and Physiology, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Tatsuya Mima
- Graduate School of Core Ethics and Frontier Sciences, Ritsumeikan University, Kyoto, Japan
| | - Hidenao Fukuyama
- Research and Educational Unit of Leaders for Integrated Medical System, Center for the Promotion of Interdisciplinary Education and Research, Kyoto University, Kyoto, Japan
| | - Ryosuke Takahashi
- Department of Neurology, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Takashi Hanakawa
- Department of Advanced Neuroimaging, Integrative Brain Imaging Center, National Center of Neurology and Psychiatry, Tokyo, Japan.,Department of Integrated Neuroanatomy and Neuroimaging, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Akio Ikeda
- Department of Epilepsy, Movement Disorders and Physiology, Kyoto University Graduate School of Medicine, Kyoto, Japan
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13
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Nishida S, Aso T, Takaya S, Takahashi Y, Kikuchi T, Funaki T, Yoshida K, Okada T, Kunieda T, Togashi K, Fukuyama H, Miyamoto S. Resting-state Functional Magnetic Resonance Imaging Identifies Cerebrovascular Reactivity Impairment in Patients With Arterial Occlusive Diseases: A Pilot Study. Neurosurgery 2020; 85:680-688. [PMID: 30247676 DOI: 10.1093/neuros/nyy434] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Accepted: 08/16/2018] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND The development of noninvasive approaches for identifying hypoperfused brain tissue at risk is of major interest. Recently, the temporal-shift (TS) maps estimated from resting-state blood oxygenation level-dependent (BOLD) signals have been proposed for determining hemodynamic state. OBJECTIVE To examine the equivalency of the TS map and the cerebrovascular reactivity (CVR) map derived from acetazolamide-challenged single-photon emission computed tomography (SPECT) in identifying hemodynamic impairment in patients with arterial occlusive diseases. METHODS Twenty-three patients with arterial occlusive diseases who underwent SPECT were studied. With a recursive TS analysis of low-frequency fluctuation of the BOLD signal, a TS map relative to the global signal was created for each patient. The voxel-by-voxel correlation coefficient was calculated to examine the image similarity between TS and SPECT-based cerebral blood flow (CBF) or CVR maps in each patient. Furthermore, simple linear regression analyses were performed to examine the quantitative relationship between the TS of BOLD signals and CVR in each cerebrovascular territory. RESULTS The within-patient, voxel-by-voxel comparison revealed that the TS map was more closely correlated with SPECT-CVR map ([Z(r)] = 0.42 ± 0.18) than SPECT-CBF map ([Z(r)] = 0.058 ± 0.11; P < .001, paired t-test). The regression analysis showed a significant linear association between the TS of BOLD signals and CVR in the anterior circulation where the reduction of CVR was evident in the patient group. CONCLUSION BOLD TS analysis has potential as a noninvasive alternative to current methods based on CVR for identification of tissue at risk of ischemic stroke.
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Affiliation(s)
- Sei Nishida
- Department of Neurosurgery, Kyoto University Graduate School of Medicine, Kyoto City, Kyoto Prefecture, Japan.,Human Brain Research Center, Kyoto University Graduate School of Medicine, Kyoto City, Kyoto Prefecture, Japan
| | - Toshihiko Aso
- Human Brain Research Center, Kyoto University Graduate School of Medicine, Kyoto City, Kyoto Prefecture, Japan.,Department of Psychiatry, Kyoto University Graduate School of Medicine, Kyoto City, Kyoto Prefecture, Japan
| | - Shigetoshi Takaya
- Human Brain Research Center, Kyoto University Graduate School of Medicine, Kyoto City, Kyoto Prefecture, Japan.,Department of Neurology, Kyoto University Graduate School of Medicine, Kyoto City, Kyoto Prefecture, Japan.,Senri Rehabilitation Hospital, Mino City, Osaka Prefecture, Japan
| | - Yuki Takahashi
- Department of Neurosurgery, Kyoto University Graduate School of Medicine, Kyoto City, Kyoto Prefecture, Japan.,Human Brain Research Center, Kyoto University Graduate School of Medicine, Kyoto City, Kyoto Prefecture, Japan
| | - Takayuki Kikuchi
- Department of Neurosurgery, Kyoto University Graduate School of Medicine, Kyoto City, Kyoto Prefecture, Japan
| | - Takeshi Funaki
- Department of Neurosurgery, Kyoto University Graduate School of Medicine, Kyoto City, Kyoto Prefecture, Japan
| | - Kazumichi Yoshida
- Department of Neurosurgery, Kyoto University Graduate School of Medicine, Kyoto City, Kyoto Prefecture, Japan
| | - Tomohisa Okada
- Human Brain Research Center, Kyoto University Graduate School of Medicine, Kyoto City, Kyoto Prefecture, Japan.,Department of Radiology, Kyoto University Graduate School of Medicine, Kyoto City, Kyoto Prefecture, Japan
| | - Takeharu Kunieda
- Department of Neurosurgery, Kyoto University Graduate School of Medicine, Kyoto City, Kyoto Prefecture, Japan.,Department of Neurosurgery, Ehime University Graduate School of Medicine, Toon City, Ehime Prefecture, Japan
| | - Kaori Togashi
- Department of Radiology, Kyoto University Graduate School of Medicine, Kyoto City, Kyoto Prefecture, Japan
| | - Hidenao Fukuyama
- Human Brain Research Center, Kyoto University Graduate School of Medicine, Kyoto City, Kyoto Prefecture, Japan
| | - Susumu Miyamoto
- Department of Neurosurgery, Kyoto University Graduate School of Medicine, Kyoto City, Kyoto Prefecture, Japan
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14
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Zhang Z, Chen G, Zhang J, Yan T, Go R, Fukuyama H, Wu J, Han Y, Li C. Tactile Angle Discrimination Decreases due to Subjective Cognitive Decline in Alzheimer's Disease. Curr Alzheimer Res 2020; 17:168-176. [PMID: 32148194 DOI: 10.2174/1567205017666200309104033] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2019] [Revised: 12/23/2019] [Accepted: 02/24/2020] [Indexed: 11/22/2022]
Abstract
BACKGROUND Subjective Cognitive Decline (SCD) is the early preclinical stage of Alzheimer's Disease (AD). Previous study provided an invaluable contribution by showing that a tactile angle discrimination system can be used to distinguish between healthy older individuals and patients with mild cognitive impairment and AD. However, that study paid little attention to the relationship between tactile angle discrimination and SCD. Therefore, a means of differentiating Normal Controls (NCs), elderly subjects with SCD, patients with amnestic Mild Cognitive Impairment (aMCI), and AD is urgently needed. METHODS In the present study, we developed a novel tactile discrimination device that uses angle stimulation applied to the index finger pad to identify very small differences in angle discrimination between the NC (n = 30), SCD (n = 30), aMCI (n = 30), and AD (n = 30) groups. Using a three-alternative forced-choice and staircase method, we analyzed the average accuracy and threshold of angle discrimination. RESULTS We found that accuracy significantly decreased while thresholds of angle discrimination increased in the groups in the following order: NC, SCD, aMCI, and AD. The area under the receiver operating characteristic curve also indicated that the tactile angle discrimination threshold was better than Mini-Mental State Examination scores in distinguishing NC individuals and SCD patients. CONCLUSION These findings emphasize the importance of tactile working memory dysfunction in explaining the cognitive decline in angle discrimination that occurs in SCD to AD patients and offer further insight into the very early detection of subjects with AD.
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Affiliation(s)
- Zhilin Zhang
- Department of Psychiatry, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Guanqun Chen
- Department of Neurology, Xuanwu Hospital of Capital Medical University, Beijing, China
| | - Jian Zhang
- School of Mechatronical Engineering, Beijing Institute of Technology, Beijing, China
| | - Tianyi Yan
- School of Life Science, Beijing Institute of Technology, Beijing, China
| | - Ritsu Go
- School of Mechatronical Engineering, Beijing Institute of Technology, Beijing, China.,Key Laboratory of Biomimetic Robots and Systems, Beijing, China
| | - Hidenao Fukuyama
- School of Mechatronical Engineering, Beijing Institute of Technology, Beijing, China
| | - Jinglong Wu
- School of Mechatronical Engineering, Beijing Institute of Technology, Beijing, China.,Key Laboratory of Biomimetic Robots and Systems, Beijing, China
| | - Ying Han
- Department of Neurology, Xuanwu Hospital of Capital Medical University, Beijing, China
| | - Chunlin Li
- School of Biomedical Engineering, Capital Medical University, Beijing, China
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15
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Aso T, Urayama S, Fukuyama H, Murai T. Correction: Axial variation of deoxyhemoglobin density as a source of the low-frequency time lag structure in blood oxygenation level-dependent signals. PLoS One 2019; 14:e0225489. [PMID: 31725801 PMCID: PMC6855433 DOI: 10.1371/journal.pone.0225489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
[This corrects the article DOI: 10.1371/journal.pone.0222787.].
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16
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Brillo J, Wessing J, Kobatake H, Fukuyama H. Erratum to “Surface tension of liquid Ti with adsorbed oxygen and its prediction” [J. Mol. Liquids 290 (2019) 111226]. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.111597] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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17
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Aso T, Urayama S, Fukuyama H, Murai T. Axial variation of deoxyhemoglobin density as a source of the low-frequency time lag structure in blood oxygenation level-dependent signals. PLoS One 2019; 14:e0222787. [PMID: 31545839 PMCID: PMC6756514 DOI: 10.1371/journal.pone.0222787] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Accepted: 09/06/2019] [Indexed: 01/24/2023] Open
Abstract
Perfusion-related information is reportedly embedded in the low-frequency component of a blood oxygen level-dependent (BOLD) functional magnetic resonance imaging (fMRI) signal. The blood-propagation pattern through the cerebral vascular tree is detected as an interregional lag variation of spontaneous low-frequency oscillations (sLFOs). Mapping of this lag, or phase, has been implicitly treated as a projection of the vascular tree structure onto real space. While accumulating evidence supports the biological significance of this signal component, the physiological basis of the “perfusion lag structure,” a requirement for an integrative resting-state fMRI-signal model, is lacking. In this study, we conducted analyses furthering the hypothesis that the sLFO is not only largely of systemic origin, but also essentially intrinsic to blood, and hence behaves as a virtual tracer. By summing the small fluctuations of instantaneous phase differences between adjacent vascular regions, a velocity response to respiratory challenges was detected. Regarding the relationship to neurovascular coupling, the removal of the whole lag structure, which can be considered as an optimized global-signal regression, resulted in a reduction of inter-individual variance while preserving the fMRI response. Examination of the T2* and S0, or non-BOLD, components of the fMRI signal revealed that the lag structure is deoxyhemoglobin dependent, while paradoxically presenting a signal-magnitude reduction in the venous side of the cerebral vasculature. These findings provide insight into the origin of BOLD sLFOs, suggesting that they are highly intrinsic to the circulating blood.
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Affiliation(s)
- Toshihiko Aso
- Department of Psychiatry, Kyoto University Graduate School of Medicine, Kyoto, Japan
- Laboratory for Brain Connectomics Imaging, RIKEN Center for Biosystems Dynamics Research, Kobe, Japan
- Human Brain Research Center, Kyoto University Graduate School of Medicine, Kyoto, Japan
- * E-mail:
| | - Shinnichi Urayama
- Human Brain Research Center, Kyoto University Graduate School of Medicine, Kyoto, Japan
- Research and Educational Unit of Leaders for Integrated Medical System, Center for the Promotion of Interdisciplinary Education and Research, Kyoto University, Kyoto, Japan
| | - Hidenao Fukuyama
- Human Brain Research Center, Kyoto University Graduate School of Medicine, Kyoto, Japan
- Research and Educational Unit of Leaders for Integrated Medical System, Center for the Promotion of Interdisciplinary Education and Research, Kyoto University, Kyoto, Japan
| | - Toshiya Murai
- Department of Psychiatry, Kyoto University Graduate School of Medicine, Kyoto, Japan
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18
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Hiyoshi K, Becker C, Fukuyama H, Oishi N. [Overcoming Fear of Death in Home Caregiving]. Gan To Kagaku Ryoho 2019; 46:84-86. [PMID: 31189864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
This study aimed to clarify the factors for reducing the burden of caregivers caring for terminal patients. We conducted semi-structured interviews with bereaved caregivers, seeking those who had felt neither fear nor anxiety during caregiving; their responses were analyzed using the Steps for Coding and Theorization. The one caregiver who showed neither fear nor anxiety(1)believed in an afterlife,(2)sought a physician who would respect her belief,(3)sought respect for her medical decisions, and(4)found distance to the clinic to be a critical factor. Our findings suggest that doctors' respect for caregivers' beliefs may be an important factor in reducing caregiver burden at the end of life.
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Affiliation(s)
- Kazuko Hiyoshi
- Dept. f Nursing, Doshisya Women's College of Liberal Arts
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19
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Ubukata S, Oishi N, Sugihara G, Aso T, Fukuyama H, Murai T, Ueda K. Transcallosal Fiber Disruption and its Relationship with Corresponding Gray Matter Alteration in Patients with Diffuse Axonal Injury. J Neurotrauma 2019; 36:1106-1114. [DOI: 10.1089/neu.2018.5823] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Shiho Ubukata
- Department of Psychiatry, Center for the Promotion of Interdisciplinary Education and Research, Kyoto University, Kyoto, Japan
- Medical Innovation Center, Center for the Promotion of Interdisciplinary Education and Research, Kyoto University, Kyoto, Japan
| | - Naoya Oishi
- Medical Innovation Center, Center for the Promotion of Interdisciplinary Education and Research, Kyoto University, Kyoto, Japan
| | - Genichi Sugihara
- Department of Psychiatry, Center for the Promotion of Interdisciplinary Education and Research, Kyoto University, Kyoto, Japan
| | - Toshihiko Aso
- Department of Psychiatry, Center for the Promotion of Interdisciplinary Education and Research, Kyoto University, Kyoto, Japan
- Human Brain Research Center, Graduate School of Medicine, and Center for the Promotion of Interdisciplinary Education and Research, Kyoto University, Kyoto, Japan
| | - Hidenao Fukuyama
- Beijing Institute of Technology, Beijing, China
- Research and Educational Unit of Leaders for Integrated Medical System, Center for the Promotion of Interdisciplinary Education and Research, Kyoto University, Kyoto, Japan
| | - Toshiya Murai
- Department of Psychiatry, Center for the Promotion of Interdisciplinary Education and Research, Kyoto University, Kyoto, Japan
| | - Keita Ueda
- Department of Psychiatry, Center for the Promotion of Interdisciplinary Education and Research, Kyoto University, Kyoto, Japan
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20
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Suzuki T, Oishi N, Fukuyama H. Simultaneous infrared thermal imaging and laser speckle imaging of brain temperature and cerebral blood flow in rats. J Biomed Opt 2018; 24:1-11. [PMID: 30468045 PMCID: PMC6975233 DOI: 10.1117/1.jbo.24.3.031014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Accepted: 11/05/2018] [Indexed: 06/09/2023]
Abstract
Infrared thermal imaging of brain temperature changes is useful for evaluating cortical activity and disease states, such as stroke. However, the changes depend on a balance between changes in heat generation from metabolism and in heat convection related to blood flow. To discriminate between these effects and gain a clearer understanding of neurovascular metabolic coupling, brain temperature imaging must be improved to measure temperature and blood flow simultaneously. We develop an imaging technique that shows a two-dimensional (2-D) distribution of absolute brain temperature and relative cerebral blood flow changes in anesthetized rats by combining infrared thermal imaging with laser speckle imaging. The changes in brain metabolism and cerebral blood flow are achieved using two different anesthetics (isoflurane and α-chloralose) to evaluate our system. Isoflurane increased cerebral blood flow but decreased metabolism, whereas α-chloralose decreased both parameters. This technique enables simultaneous visualization of brain surface changes in temperature and cerebral blood flow in the same regions. This imaging system will permit further study of neurovascular metabolic coupling in normal and diseased brains.
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Affiliation(s)
- Takashi Suzuki
- Kyoto University, Research and Educational Unit of Leaders for Integrated Medical System, Center for the Promotion of Interdisciplinary Education and Research, Kyoto, Japan
| | - Naoya Oishi
- Kyoto University, Research and Educational Unit of Leaders for Integrated Medical System, Center for the Promotion of Interdisciplinary Education and Research, Kyoto, Japan
| | - Hidenao Fukuyama
- Kyoto University, Research and Educational Unit of Leaders for Integrated Medical System, Center for the Promotion of Interdisciplinary Education and Research, Kyoto, Japan
- Beijing Institute of Technology, Human Brain Research Laboratory, Intelligent Robotics Institute, Beijing, China
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21
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Nakaoku Y, Oishi N, Hase Y, Hase M, Saito S, Mitsueda T, Matsui M, Toyoda K, Nagatsuka K, Kalaria RN, Fukuyama H, Ihara M, Takahashi R. Montreal Cognitive Assessment score correlates with regional cerebral blood flow in post-stroke patients. Clin Neurol Neurosurg 2018; 174:68-74. [DOI: 10.1016/j.clineuro.2018.09.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Revised: 08/28/2018] [Accepted: 09/03/2018] [Indexed: 12/21/2022]
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22
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Yu Y, Yang J, Ejima Y, Fukuyama H, Wu J. Asymmetric Functional Connectivity of the Contra- and Ipsilateral Secondary Somatosensory Cortex during Tactile Object Recognition. Front Hum Neurosci 2018; 11:662. [PMID: 29416506 PMCID: PMC5787555 DOI: 10.3389/fnhum.2017.00662] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Accepted: 12/29/2017] [Indexed: 12/18/2022] Open
Abstract
In the somatosensory system, it is well known that the bilateral secondary somatosensory cortex (SII) receives projections from the unilateral primary somatosensory cortex (SI), and the SII, in turn, sends feedback projections to SI. Most neuroimaging studies have clearly shown bilateral SII activation using only unilateral stimulation for both anatomical and functional connectivity across SII subregions. However, no study has unveiled differences in the functional connectivity of the contra- and ipsilateral SII network that relates to frontoparietal areas during tactile object recognition. Therefore, we used event-related functional magnetic resonance imaging (fMRI) and a delayed match-to-sample (DMS) task to investigate the contributions of bilateral SII during tactile object recognition. In the fMRI experiment, 14 healthy subjects were presented with tactile angle stimuli on their right index finger and asked to encode three sample stimuli during the encoding phase and one test stimulus during the recognition phase. Then, the subjects indicated whether the angle of test stimulus was presented during the encoding phase. The results showed that contralateral (left) SII activity was greater than ipsilateral (right) SII activity during the encoding phase, but there was no difference during the recognition phase. A subsequent psycho-physiological interaction (PPI) analysis revealed distinct connectivity from the contra- and ipsilateral SII to other regions. The left SII functionally connected to the left SI and right primary and premotor cortex, while the right SII functionally connected to the left posterior parietal cortex (PPC). Our findings suggest that in situations involving unilateral tactile object recognition, contra- and ipsilateral SII will induce an asymmetrical functional connectivity to other brain areas, which may occur by the hand contralateral effect of SII.
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Affiliation(s)
- Yinghua Yu
- Division of Medical Bioengineering, Graduate School of Natural Science and Technology, Okayama University, Okayama, Japan.,Section on Functional Imaging Methods, National Institute of Mental Health, Bethesda, MD, United States.,The Japan Society for the Promotion of Science, Tokyo, Japan
| | - Jiajia Yang
- Division of Medical Bioengineering, Graduate School of Natural Science and Technology, Okayama University, Okayama, Japan.,Section on Functional Imaging Methods, National Institute of Mental Health, Bethesda, MD, United States
| | - Yoshimichi Ejima
- Division of Medical Bioengineering, Graduate School of Natural Science and Technology, Okayama University, Okayama, Japan
| | - Hidenao Fukuyama
- Beijing Institute of Technology, Beijing, China.,Human Brain Research Center (HBRC), Kyoto University Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Jinglong Wu
- Beijing Institute of Technology, Beijing, China.,Division of Medical Bioengineering, Graduate School of Natural Science and Technology, Okayama University, Okayama, Japan
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23
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Ishibashi R, Mima T, Fukuyama H, Pobric G. Facilitation of Function and Manipulation Knowledge of Tools Using Transcranial Direct Current Stimulation (tDCS). Front Integr Neurosci 2018; 11:37. [PMID: 29354036 PMCID: PMC5758506 DOI: 10.3389/fnint.2017.00037] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2017] [Accepted: 12/08/2017] [Indexed: 12/14/2022] Open
Abstract
Using a variety of tools is a common and essential component of modern human life. Patients with brain damage or neurological disorders frequently have cognitive deficits in their recognition and manipulation of tools. In this study, we focused on improving tool-related cognition using transcranial direct current stimulation (tDCS). Converging evidence from neuropsychology, neuroimaging and non- invasive brain stimulation has identified the anterior temporal lobe (ATL) and inferior parietal lobule (IPL) as brain regions supporting action semantics. We observed enhanced performance in tool cognition with anodal tDCS over ATL and IPL in two cognitive tasks that require rapid access to semantic knowledge about the function or manipulation of common tools. ATL stimulation improved access to both function and manipulation knowledge of tools. The effect of IPL stimulation showed a trend toward better manipulation judgments. Our findings support previous studies of tool semantics and provide a novel approach for manipulation of underlying circuits.
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Affiliation(s)
- Ryo Ishibashi
- Neuroscience and Aphasia Research Unit, Division of Neuroscience and Experimental Psychology, University of Manchester, Manchester, United Kingdom.,Smart Aging Research Center, Tohoku University, Sendai, Japan
| | - Tatsuya Mima
- Graduate School of Core Ethics and Frontier Sciences, Ritsumeikan University, Kyoto, Japan
| | - Hidenao Fukuyama
- Human Brain Research Center, Graduate School of Medicine, Kyoto University, Kyoto, Japan.,Intelligent Robotics Institute, Beijing Institute of Technology, Beijing, China
| | - Gorana Pobric
- Neuroscience and Aphasia Research Unit, Division of Neuroscience and Experimental Psychology, University of Manchester, Manchester, United Kingdom
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Ishii T, Tachibana N, Fukuyama H. Morning chronotype in old age is associated with better mental health in community-Dwelling elderly people. Sleep Med 2017. [DOI: 10.1016/j.sleep.2017.11.418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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25
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Satow T, Aso T, Nishida S, Komuro T, Ueno T, Oishi N, Nakagami Y, Odagiri M, Kikuchi T, Yoshida K, Ueda K, Kunieda T, Murai T, Miyamoto S, Fukuyama H. Alteration of Venous Drainage Route in Idiopathic Normal Pressure Hydrocephalus and Normal Aging. Front Aging Neurosci 2017; 9:387. [PMID: 29218007 PMCID: PMC5703706 DOI: 10.3389/fnagi.2017.00387] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2017] [Accepted: 11/10/2017] [Indexed: 12/13/2022] Open
Abstract
Idiopathic normal pressure hydrocephalus (iNPH) is a highly prevalent condition in the elderly population; however, the underlying pathophysiology in relation to the aging process remains unclear. To investigate the effect of removal of cerebrospinal fluid by lumbar “tap test” on the cerebral circulation in patients with iNPH, 14 patients with “probable” iNPH were studied using a novel blood tracking technique based on blood oxygenation level-dependent (BOLD) magnetic resonance signal intensity. By tracking the propagation of the low-frequency component of the BOLD signal, extended venous drainage times were observed in the periventricular region of the patients, which was reversed by tap test. Interestingly, the venous drainage time in the periventricular region exhibited an age-related prolongation in the healthy control group. Additional regression analyses involving 81 control subjects revealed a dissociation of deep and superficial venous systems with increasing age, presumably reflecting focal inefficiency in the deep system. Our results not only provide insights into the etiology of iNPH, but also point to a potential non-invasive biomarker for screening iNPH.
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Affiliation(s)
- Takeshi Satow
- Department of Neurosurgery, Nagahama City Hospital, Nagahama, Japan
| | - Toshihiko Aso
- Human Brain Research Center, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Sei Nishida
- Human Brain Research Center, Kyoto University Graduate School of Medicine, Kyoto, Japan.,Department of Neurosurgery, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Taro Komuro
- Department of Neurosurgery, Nagahama City Hospital, Nagahama, Japan
| | - Tsukasa Ueno
- Department of Psychiatry, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Naoya Oishi
- Human Brain Research Center, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Yukako Nakagami
- Department of Psychiatry, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Masashi Odagiri
- Faculty of Health Care Science, Kyoto Tachibana University, Kyoto, Japan
| | - Takayuki Kikuchi
- Department of Neurosurgery, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Kazumichi Yoshida
- Department of Neurosurgery, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Keita Ueda
- Department of Psychiatry, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Takeharu Kunieda
- Department of Neurosurgery, Kyoto University Graduate School of Medicine, Kyoto, Japan.,Department of Neurosurgery, Graduate School of Medicine, Ehime University, Matsuyama, Japan
| | - Toshiya Murai
- Department of Psychiatry, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Susumu Miyamoto
- Department of Neurosurgery, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Hidenao Fukuyama
- Human Brain Research Center, Kyoto University Graduate School of Medicine, Kyoto, Japan
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Takaya S, Sawamoto N, Okada T, Okubo G, Nishida S, Togashi K, Fukuyama H, Takahashi R. Differential diagnosis of parkinsonian syndromes using dopamine transporter and perfusion SPECT. Parkinsonism Relat Disord 2017; 47:15-21. [PMID: 29157745 DOI: 10.1016/j.parkreldis.2017.11.333] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Revised: 10/09/2017] [Accepted: 11/13/2017] [Indexed: 11/17/2022]
Abstract
OBJECTIVE We aimed to assess whether a combined analysis of dopamine transporter (DAT)- and perfusion-SPECT images (or either) could: (1) distinguish atypical parkinsonian syndromes (APS) from Lewy body diseases (LBD; majority Parkinson disease [PD]), and (2) differentiate among APS subgroups (progressive supranuclear palsy [PSP], corticobasal syndrome [CBS], and multiple system atrophy [MSA]). METHODS We recruited consecutive patients with neurodegenerative parkinsonian syndromes (LBD, n = 46; APS, n = 33). Individual [123I]FP-CIT- and [123I]iodoamphetamine-SPECT images were coregistered onto anatomical MRI segmented into brain regions. Striatal DAT activity and regional perfusion were extracted from each brain region for each patient and submitted to logistic regression analyses. Stepwise procedures were used to select predictors that should be included in the models to distinguish APS from LBD, and differentiate among the APS subgroups. Receiver-operating characteristic (ROC) analyses were performed to measure diagnostic power. Leave-one-out cross-validation (LOOCV) was performed to evaluate the diagnostic accuracy. RESULTS The model to discriminate APS from LBD showed that the area under the ROC curve (AUC) was 0.923, while the total diagnostic accuracy (TDA) was 86.1% in LOOCV. In the model to distinguish PSP, CBS, and MSA from LBD, the AUC/TDA values were 0.978/94.6%, 0.978/87.0%, and 0.880/80.3%, respectively. In the model to differentiate between CBS and MSA, MSA and PSP, and PSP and CBS, the AUC/TDA values were 0.967/91.3%, 0.920/88.0%, 0.875/77.8%, respectively. CONCLUSION An image-based automated classification using striatal DAT activity and regional perfusion patterns provided a good performance in the differential diagnosis of neurodegenerative parkinsonian syndromes without clinical information.
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Affiliation(s)
- Shigetoshi Takaya
- Department of Neurology, Kyoto University Graduate School of Medicine, Kyoto, Japan; Human Brain Research Center, Kyoto University Graduate School of Medicine, Kyoto, Japan; Currently Senri Rehabilitation Hospital, Osaka, Japan.
| | - Nobukatsu Sawamoto
- Department of Neurology, Kyoto University Graduate School of Medicine, Kyoto, Japan; Human Health Science, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Tomohisa Okada
- Human Brain Research Center, Kyoto University Graduate School of Medicine, Kyoto, Japan; Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Gosuke Okubo
- Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Sei Nishida
- Human Brain Research Center, Kyoto University Graduate School of Medicine, Kyoto, Japan; Department of Neurosurgery, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Kaori Togashi
- Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Hidenao Fukuyama
- Human Brain Research Center, Kyoto University Graduate School of Medicine, Kyoto, Japan; Center for the Promotion of Interdisciplinary Education and Research, Kyoto University, Kyoto, Japan
| | - Ryosuke Takahashi
- Department of Neurology, Kyoto University Graduate School of Medicine, Kyoto, Japan
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Ota K, Oishi N, Ito K, Fukuyama H. Prediction of Alzheimer's Disease in Amnestic Mild Cognitive Impairment Subtypes: Stratification Based on Imaging Biomarkers. J Alzheimers Dis 2017; 52:1385-401. [PMID: 27079727 DOI: 10.3233/jad-160145] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
BACKGROUND Prediction of progression to Alzheimer's disease (AD) in amnestic mild cognitive impairment (MCI) is challenging because of its heterogeneity. OBJECTIVE To evaluate a stratification method on different cohorts and to investigate whether stratification in amnestic MCI could improve prediction accuracy. METHODS We identified 80 and 79 patients with amnestic MCI from different cohorts, respectively. They underwent baseline magnetic resonance imaging (MRI) and 18F-fluorodeoxyglucose (FDG) positron emission tomography (PET) scans. We performed hierarchical clustering with three imaging biomarkers: Brain volume on MRI, left hippocampus grey matter loss on MRI, and left inferior temporal gyrus glucose hypometabolism on FDG-PET. Regions-of-interest for biomarkers were defined by the Automated Anatomical Labeling atlas. We performed voxel-wise statistical parametric mapping to explore differences between clusters in patterns of grey matter loss and glucose hypometabolism. We compared time to progression using an interval-censored parametric model. We evaluated predictive performance using logistic regression. RESULTS Similar clusters were found in different cohorts. MCI1 had the healthiest biomarker profile of cognitive performance and imaging biomarkers. MCI2 had cognitive performance and MRI measures intermediate between those of nonconverters and converters. MCI3 showed the severest reduction in brain volume and left hippocampal atrophy. MCI4 showed remarkable glucose hypometabolism in the left inferior temporal gyrus, and also demonstrated significant decreases in most cognitive scores, including non-memory functions. MCI4 showed the highest risk for progression. The prediction of progression of MCI2 especially benefited from the stratification. CONCLUSION Stratification with imaging biomarkers in amnestic MCI can be a good approach for improving predictive performance.
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Affiliation(s)
- Kenichi Ota
- Human Brain Research Center, Kyoto University Graduate School of Medicine, Kyoto, Japan.,Center for the Promotion of Interdisciplinary Education and Research, Kyoto University, Kyoto, Japan
| | - Naoya Oishi
- Human Brain Research Center, Kyoto University Graduate School of Medicine, Kyoto, Japan.,Department of Psychiatry, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Kengo Ito
- Department of Clinical and Experimental Neuroimaging, National Center for Geriatrics and Gerontology, Obu, Japan
| | - Hidenao Fukuyama
- Human Brain Research Center, Kyoto University Graduate School of Medicine, Kyoto, Japan.,Center for the Promotion of Interdisciplinary Education and Research, Kyoto University, Kyoto, Japan
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Oishi N, Fukuyama H. Deep structural learning for classification of Alzheimer's disease. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.2282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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29
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Hiyoshi K, Becker C, Oishi N, Fukuyama H. A review of effects of death anxiety on the human brain. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.732] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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30
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Takaya S, Sawamoto N, Okada T, Okubo G, Nishida S, Togashi K, Fukuyama H, Takahashi R. Discriminating atypical Parkinsonian syndromes from lewy body diseases using striatal dopamine transporter activity and regional perfusion images. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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31
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Altmann CF, Ueda R, Bucher B, Furukawa S, Ono K, Kashino M, Mima T, Fukuyama H. Trading of dynamic interaural time and level difference cues and its effect on the auditory motion-onset response measured with electroencephalography. Neuroimage 2017; 159:185-194. [DOI: 10.1016/j.neuroimage.2017.07.055] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2017] [Revised: 06/15/2017] [Accepted: 07/25/2017] [Indexed: 11/29/2022] Open
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Assael MJ, Antoniadis KD, Wakeham WA, Huber ML, Fukuyama H. Reference Correlations for the Thermal Conductivity of Liquid Bismuth, Cobalt, Germanium and Silicon. J Phys Chem Ref Data 2017; 46:033101. [PMID: 28970643 PMCID: PMC5621605 DOI: 10.1063/1.4991518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The available experimental data for the thermal conductivity of liquid bismuth, cobalt, germanium and silicon have been critically examined with the intention of establishing thermal conductivity reference correlations. All experimental data have been categorized into primary and secondary data according to the quality of measurement specified by a series of criteria. The proposed standard reference correlations for the thermal conductivity of liquid bismuth, cobalt, germanium, and silicon are respectively characterized by uncertainties of 10, 15, 16 and 9.5% at the 95% confidence level.
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Affiliation(s)
- M. J. Assael
- Chemical Engineering Department, Aristotle University, Thessaloniki 54646, Greece
| | - K. D. Antoniadis
- Chemical Engineering Department, Aristotle University, Thessaloniki 54646, Greece
- Berkeley & Imperial L.P., Tantalidou 6, Thessaloniki 54629, Greece
| | - W. A. Wakeham
- Department of Chemical Engineering, Imperial College London, London SW7 2BY, UK
| | - M. L. Huber
- Applied Chemicals and Materials Division, National Institute of Standards and Technology, Boulder, Colorado 80305-3337, USA
| | - H. Fukuyama
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1, Katahira, Aobaku, Sendai, Miyagi 980-8577, Japan
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33
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Altmann CF, Ueda R, Furukawa S, Kashino M, Mima T, Fukuyama H. Auditory Mismatch Negativity in Response to Changes of Counter-Balanced Interaural Time and Level Differences. Front Neurosci 2017; 11:387. [PMID: 28729820 PMCID: PMC5498526 DOI: 10.3389/fnins.2017.00387] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2017] [Accepted: 06/20/2017] [Indexed: 11/13/2022] Open
Abstract
Interaural time differences (ITD) and interaural level differences (ILD) both signal horizontal sound source location. To achieve a unified percept of our acoustic environment, these two cues require integration. In the present study, we tested this integration of ITD and ILD with electroencephalography (EEG) by measuring the mismatch negativity (MMN). The MMN can arise in response to spatial changes and is at least partly generated in auditory cortex. In our study, we aimed at testing for an MMN in response to stimuli with counter-balanced ITD/ILD cues. To this end, we employed a roving oddball paradigm with alternating sound sequences in two types of blocks: (a) lateralized stimuli with congruently combined ITD/ILD cues and (b) midline stimuli created by counter-balanced, incongruently combined ITD/ILD cues. We observed a significant MMN peaking at about 112–128 ms after change onset for the congruent ITD/ILD cues, for both lower (0.5 kHz) and higher carrier frequency (4 kHz). More importantly, we also observed significant MMN peaking at about 129 ms for incongruently combined ITD/ILD cues, but this effect was only detectable in the lower frequency range (0.5 kHz). There were no significant differences of the MMN responses for the two types of cue combinations (congruent/incongruent). These results suggest that—at least in the lower frequency ranges (0.5 kHz)—ITD and ILD are processed independently at the level of the MMN in auditory cortex.
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Affiliation(s)
- Christian F Altmann
- Human Brain Research Center, Graduate School of Medicine, Kyoto UniversityKyoto, Japan
| | - Ryuhei Ueda
- Department of Psychology, Graduate School of Letters, Kyoto UniversityKyoto, Japan
| | - Shigeto Furukawa
- NTT Communication Science Laboratories, NTT CorporationAtsugi, Japan
| | - Makio Kashino
- NTT Communication Science Laboratories, NTT CorporationAtsugi, Japan
| | - Tatsuya Mima
- Graduate School of Core Ethics and Frontier Science, Ritsumeikan UniversityKyoto, Japan
| | - Hidenao Fukuyama
- Human Brain Research Center, Graduate School of Medicine, Kyoto UniversityKyoto, Japan
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Kobayashi K, Matsumoto R, Matsuhashi M, Usami K, Shimotake A, Kunieda T, Kikuchi T, Yoshida K, Mikuni N, Miyamoto S, Fukuyama H, Takahashi R, Ikeda A. High frequency activity overriding cortico-cortical evoked potentials reflects altered excitability in the human epileptic focus. Clin Neurophysiol 2017; 128:1673-1681. [PMID: 28750290 DOI: 10.1016/j.clinph.2017.06.249] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2016] [Revised: 05/10/2017] [Accepted: 06/22/2017] [Indexed: 11/25/2022]
Abstract
OBJECTIVE We aimed to clarify that high frequency activity (HFA) of cortico-cortical evoked potentials (CCEPs), elicited by single pulse electrical stimulation (SPES), reflects cortical excitability. METHODS We recruited 16 patients with refractory partial epilepsy who had chronic subdural electrode implantation for presurgical evaluation. A repetitive SPES was given to (1) the seizure onset zone (SOZ) and (2) the control cortices (non-seizure onset zone: nSOZ). CCEPs were recorded from the neighboring cortices within SOZ and nSOZ. We applied short-time Fourier transform to obtain the induced responses for the timing of early (<50ms after SPES) and late CCEP components and analyzed the logarithmic power change for ripple (<200Hz) and fast ripple (>200Hz) bands. RESULTS Twenty-one clear CCEPs were recorded for both the SOZ and nSOZ. The HFA power of early CCEPs in SOZ significantly increased compared to that in nSOZ in both frequency bands, particularly in mesial temporal lobe epilepsy (MTLE). CONCLUSION Similar to the features of spontaneous pathological HFOs, the power of stimulus-induced HFAs in SOZ were greater than that outside SOZ, particularly in MTLE. SIGNIFICANCE HFA overriding CCEPs can be a surrogate marker of cortical excitability in epileptic focus.
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Affiliation(s)
- Katsuya Kobayashi
- Department of Neurology, Kyoto University Graduate School of Medicine, 54, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan.
| | - Riki Matsumoto
- Department of Neurology, Kyoto University Graduate School of Medicine, 54, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan.
| | - Masao Matsuhashi
- Human Brain Research Center, Kyoto University Graduate School of Medicine, 54, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan.
| | - Kiyohide Usami
- Department of Neurology, Kyoto University Graduate School of Medicine, 54, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan.
| | - Akihiro Shimotake
- Department of Epilepsy, Movement Disorders and Physiology, Kyoto University Graduate School of Medicine, 54, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan.
| | - Takeharu Kunieda
- Department of Neurosurgery, Ehime University Graduate School of Medicine, Shizukawa Toon City, Ehime 791-0295, Japan; Department of Neurosurgery, Kyoto University Graduate School of Medicine, 54, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan.
| | - Takayuki Kikuchi
- Department of Neurosurgery, Kyoto University Graduate School of Medicine, 54, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan.
| | - Kazumichi Yoshida
- Department of Neurosurgery, Kyoto University Graduate School of Medicine, 54, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan.
| | - Nobuhiro Mikuni
- Department of Neurosurgery, Sapporo Medical University School of Medicine, South 1, West 16, Chuo-ku, Sapporo 060-8543, Japan.
| | - Susumu Miyamoto
- Department of Neurosurgery, Kyoto University Graduate School of Medicine, 54, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan.
| | - Hidenao Fukuyama
- Human Brain Research Center, Kyoto University Graduate School of Medicine, 54, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan.
| | - Ryosuke Takahashi
- Department of Neurology, Kyoto University Graduate School of Medicine, 54, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan.
| | - Akio Ikeda
- Department of Epilepsy, Movement Disorders and Physiology, Kyoto University Graduate School of Medicine, 54, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan.
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Yamawaki R, Nakamura K, Aso T, Shigemune Y, Fukuyama H, Tsukiura T. Remembering my friends: Medial prefrontal and hippocampal contributions to the self-reference effect on face memories in a social context. Hum Brain Mapp 2017; 38:4256-4269. [PMID: 28548263 DOI: 10.1002/hbm.23662] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2017] [Revised: 05/15/2017] [Accepted: 05/15/2017] [Indexed: 11/06/2022] Open
Abstract
Memories associated with the self are remembered more accurately than those associated with others. The memory enhancement related to the self is known as the self-reference effect (SRE). However, little is known regarding the neural mechanisms underlying the SRE in a social context modulated by social relationships. In the present fMRI study, we investigated encoding-related activation of face memories encoded with the self-referential process in a social context that was manipulated by imagining a person-to-person relationship. Healthy young adults participated in the present study. During encoding, participants encoded unfamiliar target faces by imagining a future friendship with themselves (Self), their friends (Friend), or strangers (Other). During retrieval, participants were presented with target and distracter faces one by one, and they judged whether each face had been previously learned. In the behavioral results, target faces encoded in the Self condition were remembered more accurately than those encoded in the Other condition. fMRI results demonstrated that encoding-related activation in the medial prefrontal cortex (mPFC) was significantly greater in the Self condition than in the Friend or Other conditions. In addition, the generalized psycho-physiological interaction (gPPI) analysis showed that functional connectivity between activation in the hippocampus and the cortical midline structures (CMSs), including the mPFC and precuneus, was significant in the Self but not in the Other condition. These findings suggest that the SRE in a social context could be involved in the interaction between the CMS regions, which are related to the self-referential process, and the hippocampus related to the memory process. Hum Brain Mapp 38:4256-4269, 2017. © 2017 Wiley Periodicals, Inc.
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Affiliation(s)
- Rie Yamawaki
- Department of Cognitive and Behavioral Sciences, Graduate School of Human and Environmental Studies, Kyoto University, Kyoto, 606-8501, Japan.,Faculty of Human Health Science, Graduate School of Medicine, Kyoto University, Kyoto, 606-8507, Japan.,Rehabilitation Unit, Kyoto University Hospital, Kyoto, 606-8507, Japan
| | - Kimihiro Nakamura
- Human Brain Research Center, Graduate School of Medicine, Kyoto University, Kyoto, 606-8507, Japan
| | - Toshihiko Aso
- Human Brain Research Center, Graduate School of Medicine, Kyoto University, Kyoto, 606-8507, Japan
| | - Yayoi Shigemune
- Department of Cognitive and Behavioral Sciences, Graduate School of Human and Environmental Studies, Kyoto University, Kyoto, 606-8501, Japan
| | - Hidenao Fukuyama
- Human Brain Research Center, Graduate School of Medicine, Kyoto University, Kyoto, 606-8507, Japan.,Intelligent Robotics Institute, Human Brain Research Laboratory, Beijing Institute of Technology, Beijing, 100081, China
| | - Takashi Tsukiura
- Department of Cognitive and Behavioral Sciences, Graduate School of Human and Environmental Studies, Kyoto University, Kyoto, 606-8501, Japan
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Aso T, Jiang G, Urayama SI, Fukuyama H. A Resilient, Non-neuronal Source of the Spatiotemporal Lag Structure Detected by BOLD Signal-Based Blood Flow Tracking. Front Neurosci 2017; 11:256. [PMID: 28553198 PMCID: PMC5425609 DOI: 10.3389/fnins.2017.00256] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2016] [Accepted: 04/21/2017] [Indexed: 01/08/2023] Open
Abstract
Recent evidence has suggested that blood oxygenation level-dependent (BOLD) signals convey information about brain circulation via low frequency oscillation of systemic origin (sLFO) that travels through the vascular structure ("lag mapping"). Prompted by its promising application in both physiology and pathology, we examined this signal component using multiple approaches. A total of 30 healthy volunteers were recruited to perform two reproducibility experiments at 3 Tesla using multiband echo planar imaging. The first experiment investigated the effect of denoising and the second was designed to study the effect of subject behavior on lag mapping. The lag map's intersession test-retest reproducibility and image contrast were both diminished by removal of either the neuronal or the non-neuronal (e.g., cardiac, respiratory) components by independent component analysis-based denoising, suggesting that the neurovascular coupling also comprises a part of the BOLD lag structure. The lag maps were, at the same time, robust against local perfusion increases due to visuomotor task and global changes in perfusion induced by breath-holding at the same level as the intrasession reliability. The lag structure was preserved after time-locked averaging to the visuomotor task and breath-holding events, while any preceding signal changes were canceled out for the visuomotor task, consistent with the passive effect of neurovascular coupling in the venous side of the vasculature. These findings support the current assumption that lag mapping primarily reflects vascular structure despite the presence of sLFO perturbation of neuronal or non-neuronal origin and, thus, emphasize the vascular origin of the lag map, encouraging application of BOLD-based blood flow tracking.
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Affiliation(s)
- Toshihiko Aso
- Human Brain Research Center, Kyoto University Graduate School of MedicineKyoto, Japan
| | - Guanhua Jiang
- Human Brain Research Center, Kyoto University Graduate School of MedicineKyoto, Japan
| | - Shin-Ichi Urayama
- Human Brain Research Center, Kyoto University Graduate School of MedicineKyoto, Japan
| | - Hidenao Fukuyama
- Human Brain Research Center, Kyoto University Graduate School of MedicineKyoto, Japan
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Son S, Miyata J, Mori Y, Isobe M, Urayama SI, Aso T, Fukuyama H, Murai T, Takahashi H. Lateralization of intrinsic frontoparietal network connectivity and symptoms in schizophrenia. Psychiatry Res Neuroimaging 2017; 260:23-28. [PMID: 28012423 DOI: 10.1016/j.pscychresns.2016.12.007] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/22/2016] [Revised: 11/14/2016] [Accepted: 12/10/2016] [Indexed: 11/16/2022]
Abstract
It has been frequently reported that schizophrenia patients have reduced functional lateralization in the areas related to language processing. Furthermore, there is evidence supporting that schizophrenia patients have disrupted functional connectivity in the bilateral frontoparietal networks (FPNs), of which the left is strongly associated with a cognition-language paradigm, using resting-state functional magnetic resonance imaging (rsfMRI). To examine the laterality of resting-state functional connectivity in schizophrenia, we investigated the bilateral FPNs. We investigated 41 schizophrenia and 35 healthy participants using independent component analysis for rsfMRI. We extracted mean connectivity values of both left and right FPNs and calculated their laterality index by (left - right)/(left + right). Subsequently, we investigated group differences of these values and the correlation between these values and symptoms. In schizophrenia, mean connectivity values of both left and right FPNs were significantly lower than in healthy controls, whereas their laterality indices were not significantly different. However, correlation analyses revealed that the laterality index was negatively correlated with positive symptoms, and that mean connectivity of left FPN was negatively correlated with depressive symptoms in schizophrenia. Our results suggest that language-related networks and their laterality might be one of the neural correlates of schizophrenia symptoms.
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Affiliation(s)
- Shuraku Son
- Department of Psychiatry, Graduate School of Medicine, Kyoto University, 54 Shogoin-Kawaharacho, Sakyo-ku, Kyoto 606-8507, Japan
| | - Jun Miyata
- Department of Psychiatry, Graduate School of Medicine, Kyoto University, 54 Shogoin-Kawaharacho, Sakyo-ku, Kyoto 606-8507, Japan.
| | - Yasuo Mori
- Department of Psychiatry, Graduate School of Medicine, Kyoto University, 54 Shogoin-Kawaharacho, Sakyo-ku, Kyoto 606-8507, Japan
| | - Masanori Isobe
- Department of Psychiatry, Graduate School of Medicine, Kyoto University, 54 Shogoin-Kawaharacho, Sakyo-ku, Kyoto 606-8507, Japan
| | - Shin-Ichi Urayama
- Human Brain Research Center, Graduate School of Medicine, Kyoto University, 54 Shogoin-Kawaharacho, Sakyo-ku, Kyoto 606-8507, Japan
| | - Toshihiko Aso
- Human Brain Research Center, Graduate School of Medicine, Kyoto University, 54 Shogoin-Kawaharacho, Sakyo-ku, Kyoto 606-8507, Japan
| | - Hidenao Fukuyama
- Research and Educational Unit of Leaders for Integrated Medical System, Center for the Promotion of Interdisciplinary Education and Research, Kyoto University, Japan
| | - Toshiya Murai
- Department of Psychiatry, Graduate School of Medicine, Kyoto University, 54 Shogoin-Kawaharacho, Sakyo-ku, Kyoto 606-8507, Japan
| | - Hidehiko Takahashi
- Department of Psychiatry, Graduate School of Medicine, Kyoto University, 54 Shogoin-Kawaharacho, Sakyo-ku, Kyoto 606-8507, Japan
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38
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Yamao Y, Suzuki K, Kunieda T, Matsumoto R, Arakawa Y, Nakae T, Nishida S, Inano R, Shibata S, Shimotake A, Kikuchi T, Sawamoto N, Mikuni N, Ikeda A, Fukuyama H, Miyamoto S. Clinical impact of intraoperative CCEP monitoring in evaluating the dorsal language white matter pathway. Hum Brain Mapp 2017; 38:1977-1991. [PMID: 28112455 DOI: 10.1002/hbm.23498] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2016] [Accepted: 12/07/2016] [Indexed: 11/09/2022] Open
Abstract
In order to preserve postoperative language function, we recently proposed a new intraoperative method to monitor the integrity of the dorsal language pathway (arcuate fasciculus; AF) using cortico-cortical evoked potentials (CCEPs). Based on further investigations (20 patients, 21 CCEP investigations), including patients who were not suitable for awake surgery (five CCEP investigations) or those without preoperative neuroimaging data (eight CCEP investigations including four with untraceable tractography due to brain edema), we attempted to clarify the clinical impact of this new intraoperative method. We monitored the integrity of AF by stimulating the anterior perisylvian language area (AL) by recording CCEPs from the posterior perisylvian language area (PL) consecutively during both general anesthesia and awake condition. After tumor resection, single-pulse electrical stimuli were also applied to the floor of the removal cavity to record subcortico-cortical evoked potentials (SCEPs) at AL and PL in 12 patients (12 SCEP investigations). We demonstrated that (1) intraoperative dorsal language network monitoring was feasible even when patients were not suitable for awake surgery or without preoperative neuroimaging studies, (2) CCEP is a dynamic marker of functional connectivity or integrity of AF, and CCEP N1 amplitude could even become larger after reduction of brain edema, (3) a 50% CCEP N1 amplitude decline might be a cut-off value to prevent permanent language dysfunction due to impairment of AF, (4) a correspondence (<2.0 ms difference) of N1 onset latencies between CCEP and the sum of SCEPs indicates close proximity of the subcortical stimulus site to AF (<3.0 mm). Hum Brain Mapp 38:1977-1991, 2017. © 2017 Wiley Periodicals, Inc.
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Affiliation(s)
- Yukihiro Yamao
- Department of Neurosurgery, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Kengo Suzuki
- Department of Neurosurgery, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Takeharu Kunieda
- Department of Neurosurgery, Kyoto University Graduate School of Medicine, Kyoto, Japan.,Department of Neurosurgery, Ehime University Graduate School of Medicine, Toon, Ehime, Japan
| | - Riki Matsumoto
- Department of Neurology, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Yoshiki Arakawa
- Department of Neurosurgery, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Takuro Nakae
- Department of Neurosurgery, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Sei Nishida
- Department of Neurosurgery, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Rika Inano
- Department of Neurosurgery, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Sumiya Shibata
- Department of Neurosurgery, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Akihiro Shimotake
- Department of Neurology, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Takayuki Kikuchi
- Department of Neurosurgery, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Nobukatsu Sawamoto
- Department of Neurology, Kyoto University Graduate School of Medicine, Kyoto, Japan.,Department of Human Health Sciences, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Nobuhiro Mikuni
- Department of Neurosurgery, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Akio Ikeda
- Department of Epilepsy, Movement Disorders and Physiology, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Hidenao Fukuyama
- Human Brain Research Center, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Susumu Miyamoto
- Department of Neurosurgery, Kyoto University Graduate School of Medicine, Kyoto, Japan
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39
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Ubukata S, Ueda K, Sugihara G, Yassin W, Aso T, Fukuyama H, Murai T. Corpus Callosum Pathology as a Potential Surrogate Marker of Cognitive Impairment in Diffuse Axonal Injury. J Neuropsychiatry Clin Neurosci 2017; 28:97-103. [PMID: 26569151 DOI: 10.1176/appi.neuropsych.15070159] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Diffuse axonal injury is a major form of traumatic brain injury. Neuropsychological assessments and high-resolution structural MRI were conducted using T1-weighted and diffusion tensor imaging. This study included 10 patients with diffuse axonal injury (all men, mean age 30.8±10.5 years) and 12 age- and sex-matched normal control participants. Patients with diffuse axonal injury had widespread volume reductions and lower fractional anisotropy in the corpus callosum (CC) compared with controls. Furthermore, cognitive processing speed was associated with reductions in white matter volume and fractional anisotropy in the CC. These findings suggest that CC pathology may be a potential surrogate marker of the cognitive deficits in these patients.
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Affiliation(s)
- Shiho Ubukata
- From the Dept. of Psychiatry (SU, KU, GS, WY, TM) and the Human Brain Research Center (TA, HF), Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Keita Ueda
- From the Dept. of Psychiatry (SU, KU, GS, WY, TM) and the Human Brain Research Center (TA, HF), Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Genichi Sugihara
- From the Dept. of Psychiatry (SU, KU, GS, WY, TM) and the Human Brain Research Center (TA, HF), Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Walid Yassin
- From the Dept. of Psychiatry (SU, KU, GS, WY, TM) and the Human Brain Research Center (TA, HF), Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Toshihiko Aso
- From the Dept. of Psychiatry (SU, KU, GS, WY, TM) and the Human Brain Research Center (TA, HF), Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Hidenao Fukuyama
- From the Dept. of Psychiatry (SU, KU, GS, WY, TM) and the Human Brain Research Center (TA, HF), Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Toshiya Murai
- From the Dept. of Psychiatry (SU, KU, GS, WY, TM) and the Human Brain Research Center (TA, HF), Graduate School of Medicine, Kyoto University, Kyoto, Japan
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40
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Kida H, Satoh M, Ii Y, Fukuyama H, Maeda M, Tomimoto H. Detection of cerebral amyloid angiopathy by 3-T magnetic resonance imaging and amyloid positron emission tomography in a patient with subcortical ischaemic vascular dementia. Psychogeriatrics 2017; 17:70-72. [PMID: 26782037 DOI: 10.1111/psyg.12187] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/09/2015] [Revised: 10/26/2015] [Accepted: 11/30/2015] [Indexed: 11/29/2022]
Abstract
The patient was an 81-year-old man who had been treated for hypertension for several decades. In 2012, he developed gait disturbance and mild amnesia. One year later, his gait disturbance worsened, and he developed urinary incontinence. Conventional brain magnetic resonance imaging using T 2 -weighted images and fluid-attenuated inversion recovery showed multiple lacunar infarctions. These findings fulfilled the diagnostic criteria for subcortical ischaemic vascular dementia. However, susceptibility weighted imaging showed multiple lobar microbleeds in the bilateral occipitoparietal lobes, and double inversion recovery and 3-D fluid-attenuated inversion recovery images on 3-T magnetic resonance imaging revealed cortical microinfarctions in the left parietal-temporo-occipito region. Pittsburgh compound B-positron emission tomography revealed diffuse uptake in the cerebral cortex. Therefore, we diagnosed the patient with subcortical ischaemic vascular dementia associated with Alzheimer's disease. The use of the double inversion recovery and susceptibility weighted imaging on 3-T magnetic resonance imaging may be a supplemental strategy for diagnosing cerebral amyloid angiopathy, which is closely associated with Alzheimer's disease.
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Affiliation(s)
- Hirotaka Kida
- Department of Dementia Prevention and Therapeutics, Graduate School of Medicine, Mie University, Mie, Japan
| | - Masayuki Satoh
- Department of Dementia Prevention and Therapeutics, Graduate School of Medicine, Mie University, Mie, Japan
| | - Yuichiro Ii
- Department of Neurology, Graduate School of Medicine, Mie University, Mie, Japan
| | - Hidenao Fukuyama
- Human Brain Research Center, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Masayuki Maeda
- Department of Radiology, Graduate School of Medicine, Mie University, Mie, Japan
| | - Hidekazu Tomimoto
- Department of Dementia Prevention and Therapeutics, Graduate School of Medicine, Mie University, Mie, Japan.,Department of Neurology, Graduate School of Medicine, Mie University, Mie, Japan
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41
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Liao Y, Urayama S, Fukuyama H. SU-D-303-05: Optimal Protocols and Analysis Strategies for Intravoxel Incoherent Motion MRI. Med Phys 2016. [DOI: 10.1118/1.4923892] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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42
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Saito S, Kojima S, Oishi N, Kakuta R, Maki T, Yasuno F, Nagatsuka K, Yamamoto H, Fukuyama H, Fukushima M, Ihara M. A multicenter, randomized, placebo-controlled trial for cilostazol in patients with mild cognitive impairment: The COMCID study protocol. Alzheimers Dement (N Y) 2016; 2:250-257. [PMID: 29067312 PMCID: PMC5651350 DOI: 10.1016/j.trci.2016.10.001] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Introduction There are currently no effective treatments preventing conversion from mild cognitive impairment (MCI) to Alzheimer's disease. Cilostazol is a selective type-3 phosphodiesterase inhibitor that ameliorates accumulation of amyloid-β and has prevented cognitive decline in rodent models. Furthermore, cilostazol is known to suppress platelet aggregation, protect vascular endothelia, dilate vessels, and increase cerebral blood flow. Beneficial effects have also been shown in observational cohort studies, demonstrating the need for a prospective clinical trial. Methods The Cilostazol for prevention of COnversion from MCI to Dementia (COMCID) study is a double-blind, randomized phase II study of patients with MCI. Participants will receive cilostazol or placebo for 96 weeks. The primary objective is to evaluate whether cilostazol slows down cognitive decline measured by the Mini-Mental State Examination. Secondary objectives are assessing time to conversion from MCI to dementia and assessing incremental changes in several psychological assessment scales. Discussion The COMCID trial will identify the therapeutic potential of cilostazol. This trial, which is based on a drug repositioning strategy, may aid the development of a neurovascular treatment for neurocognitive disorders.
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Affiliation(s)
- Satoshi Saito
- Department of Regenerative Medicine and Tissue Engineering, National Cerebral and Cardiovascular Center, Suita, Japan.,Department of Neurology, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Shinsuke Kojima
- Department of MediScience, Translational Research Informatics Center, Foundation for Biomedical Research and Innovation, Kobe, Japan
| | - Naoya Oishi
- Human Brain Research Center, Kyoto University Graduate School of Medicine, Kyoto, Japan.,Center for the Promotion of Interdisciplinary Education and Research, Kyoto University, Kyoto, Japan
| | - Ryosuke Kakuta
- Department of Stroke and Cerebrovascular Diseases, National Cerebral and Cardiovascular Center, Suita, Japan
| | - Takakuni Maki
- Department of Neurology, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Fumihiko Yasuno
- Department of Psychiatry, Nara Medical University, Kashihara, Japan
| | - Kazuyuki Nagatsuka
- Department of Stroke and Cerebrovascular Diseases, National Cerebral and Cardiovascular Center, Suita, Japan
| | - Haruko Yamamoto
- Center for Advancing Clinical and Translational Sciences, National Cerebral and Cardiovascular Center, Suita, Japan
| | - Hidenao Fukuyama
- Human Brain Research Center, Kyoto University Graduate School of Medicine, Kyoto, Japan.,Center for the Promotion of Interdisciplinary Education and Research, Kyoto University, Kyoto, Japan
| | - Masanori Fukushima
- Department of MediScience, Translational Research Informatics Center, Foundation for Biomedical Research and Innovation, Kobe, Japan
| | - Masafumi Ihara
- Department of Regenerative Medicine and Tissue Engineering, National Cerebral and Cardiovascular Center, Suita, Japan.,Department of Stroke and Cerebrovascular Diseases, National Cerebral and Cardiovascular Center, Suita, Japan
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43
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Fujino J, Fujimoto S, Kodaka F, Camerer CF, Kawada R, Tsurumi K, Tei S, Isobe M, Miyata J, Sugihara G, Yamada M, Fukuyama H, Murai T, Takahashi H. Neural mechanisms and personality correlates of the sunk cost effect. Sci Rep 2016; 6:33171. [PMID: 27611212 PMCID: PMC5017311 DOI: 10.1038/srep33171] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2016] [Accepted: 08/23/2016] [Indexed: 12/19/2022] Open
Abstract
The sunk cost effect, an interesting and well-known maladaptive behavior, is pervasive in real life, and thus has been studied in various disciplines, including economics, psychology, organizational behavior, politics, and biology. However, the neural mechanisms underlying the sunk cost effect have not been clearly established, nor have their association with differences in individual susceptibility to the effect. Using functional magnetic resonance imaging, we investigated neural responses induced by sunk costs along with measures of core human personality. We found that individuals who tend to adhere to social rules and regulations (who are high in measured agreeableness and conscientiousness) are more susceptible to the sunk cost effect. Furthermore, this behavioral observation was strongly mediated by insula activity during sunk cost decision-making. Tight coupling between the insula and lateral prefrontal cortex was also observed during decision-making under sunk costs. Our findings reveal how individual differences can affect decision-making under sunk costs, thereby contributing to a better understanding of the psychological and neural mechanisms of the sunk cost effect.
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Affiliation(s)
- Junya Fujino
- Department of Psychiatry, Kyoto University Graduate School of Medicine, 54 Shogoin-Kawaracho, Sakyo-ku, Kyoto 606-8507, Japan.,Medical Institute of Developmental Disabilities Research, Showa University, 6-11-11 Kitakarasuyama, Setagaya-ku, Tokyo, 157-8577, Japan
| | - Shinsuke Fujimoto
- Department of Psychiatry, Kyoto University Graduate School of Medicine, 54 Shogoin-Kawaracho, Sakyo-ku, Kyoto 606-8507, Japan
| | - Fumitoshi Kodaka
- Department of Psychiatry, The Jikei University School of Medicine, 3-25-8 Nishishinbashi, Minato, Tokyo 105-0003, Japan
| | - Colin F Camerer
- Division of Humanities and Social Sciences, California Institute of Technology, 1200 East California Boulevard, Pasadena, California, 91125, USA
| | - Ryosaku Kawada
- Department of Psychiatry, Kyoto University Graduate School of Medicine, 54 Shogoin-Kawaracho, Sakyo-ku, Kyoto 606-8507, Japan
| | - Kosuke Tsurumi
- Department of Psychiatry, Kyoto University Graduate School of Medicine, 54 Shogoin-Kawaracho, Sakyo-ku, Kyoto 606-8507, Japan
| | - Shisei Tei
- Department of Psychiatry, Kyoto University Graduate School of Medicine, 54 Shogoin-Kawaracho, Sakyo-ku, Kyoto 606-8507, Japan.,Institute of Applied Brain Sciences, Waseda University, 2-579-15 Mikajima, Tokorozawa, Saitama 359-1192, Japan.,School of Human and Social Sciences, Tokyo International University, 2509 Matoba, Kawagoe, Saitama 350-1198, Japan
| | - Masanori Isobe
- Department of Psychiatry, Kyoto University Graduate School of Medicine, 54 Shogoin-Kawaracho, Sakyo-ku, Kyoto 606-8507, Japan
| | - Jun Miyata
- Department of Psychiatry, Kyoto University Graduate School of Medicine, 54 Shogoin-Kawaracho, Sakyo-ku, Kyoto 606-8507, Japan
| | - Genichi Sugihara
- Department of Psychiatry, Kyoto University Graduate School of Medicine, 54 Shogoin-Kawaracho, Sakyo-ku, Kyoto 606-8507, Japan
| | - Makiko Yamada
- Molecular Neuroimaging Program, Molecular Imaging Center, National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, Japan
| | - Hidenao Fukuyama
- Human Brain Research Center, Kyoto University Graduate School of Medicine, 54 Shogoin-Kawaracho, Sakyo-ku, Kyoto 606-8507, Japan
| | - Toshiya Murai
- Department of Psychiatry, Kyoto University Graduate School of Medicine, 54 Shogoin-Kawaracho, Sakyo-ku, Kyoto 606-8507, Japan
| | - Hidehiko Takahashi
- Department of Psychiatry, Kyoto University Graduate School of Medicine, 54 Shogoin-Kawaracho, Sakyo-ku, Kyoto 606-8507, Japan
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44
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Kitamura A, Saito S, Maki T, Oishi N, Ayaki T, Hattori Y, Yamamoto Y, Urushitani M, Kalaria RN, Fukuyama H, Horsburgh K, Takahashi R, Ihara M. Gradual cerebral hypoperfusion in spontaneously hypertensive rats induces slowly evolving white matter abnormalities and impairs working memory. J Cereb Blood Flow Metab 2016; 36:1592-602. [PMID: 26661170 PMCID: PMC5012514 DOI: 10.1177/0271678x15606717] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/16/2015] [Accepted: 07/29/2015] [Indexed: 12/31/2022]
Abstract
Rats subjected to bilateral common carotid arteries (CCAs) occlusion or 2-vessel occlusion (2VO) have been used as animal models of subcortical ischemic vascular dementia (SIVD). However, these models possess an inherent limitation in that cerebral blood flow (CBF) drops sharply and substantially after ligation of CCAs without vascular risk factors and causative small vessel changes. We previously reported a novel rat model of 2-vessel gradual occlusion (2VGO) in which ameroid constrictors (ACs) were placed bilaterally in the CCAs of Wistar-Kyoto rats. To simulate SIVD pathology more closely, we applied ACs in spontaneously hypertensive rats (SHRs), which naturally develop small vessel pathology, and compared their phenotypes with SHR-2VO and sham-operated rats. The mortality rate of the SHR-2VGO was 0% while that of the SHR-2VO was 56.5%. The CBF of the SHR-2VO dropped to 50% of the baseline level at 3 h, whereas the SHR-2VGO showed a gradual CBF reduction reaching only 68% of the baseline level at seven days. The SHR-2VGO showed slowly evolving white matter abnormalities and subsequent spatial working memory impairments of a similar magnitude to the remaining SHR-2VO at 28 days. We suggest the SHR-2VGO robustly replicates selective aspects of the pathophysiology of SIVD with low mortality rate.
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Affiliation(s)
- Akihiro Kitamura
- Department of Neurology, Graduate School of Medicine, Kyoto University, Sakyo-ku, Kyoto, Japan
| | - Satoshi Saito
- Department of Neurology, Graduate School of Medicine, Kyoto University, Sakyo-ku, Kyoto, Japan Department of Regenerative Medicine and Tissue Engineering, National Cerebral and Cardiovascular Center, Suita, Japan
| | - Takakuni Maki
- Department of Neurology, Graduate School of Medicine, Kyoto University, Sakyo-ku, Kyoto, Japan
| | - Naoya Oishi
- Human Brain Research Center, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Takashi Ayaki
- Department of Neurology, Graduate School of Medicine, Kyoto University, Sakyo-ku, Kyoto, Japan
| | - Yorito Hattori
- Department of Regenerative Medicine and Tissue Engineering, National Cerebral and Cardiovascular Center, Suita, Japan
| | - Yumi Yamamoto
- Department of Regenerative Medicine and Tissue Engineering, National Cerebral and Cardiovascular Center, Suita, Japan
| | - Makoto Urushitani
- Department of Neurology, Graduate School of Medicine, Kyoto University, Sakyo-ku, Kyoto, Japan
| | - Raj N Kalaria
- Institute of Neuroscience, Campus for Ageing and Vitality, Newcastle University, UK
| | - Hidenao Fukuyama
- Human Brain Research Center, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Karen Horsburgh
- Centre for Neuroregeneration, University of Edinburgh, Edinburgh, UK
| | - Ryosuke Takahashi
- Department of Neurology, Graduate School of Medicine, Kyoto University, Sakyo-ku, Kyoto, Japan
| | - Masafumi Ihara
- Department of Stroke and Cerebrovascular Diseases, National Cerebral and Cardiovascular Center, Suita, Japan
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45
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Aso T, Nishimura K, Kiyonaka T, Aoki T, Inagawa M, Matsuhashi M, Tobinaga Y, Fukuyama H. Dynamic interactions of the cortical networks during thought suppression. Brain Behav 2016; 6:e00503. [PMID: 27547504 PMCID: PMC4980473 DOI: 10.1002/brb3.503] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Revised: 04/06/2016] [Accepted: 05/03/2016] [Indexed: 11/23/2022] Open
Abstract
OBJECTIVES Thought suppression has spurred extensive research in clinical and preclinical fields, particularly with regard to the paradoxical aspects of this behavior. However, the involvement of the brain's inhibitory system in the dynamics underlying the continuous effort to suppress thoughts has yet to be clarified. This study aims to provide a unified perspective for the volitional suppression of internal events incorporating the current understanding of the brain's inhibitory system. MATERIALS AND METHODS Twenty healthy volunteers underwent functional magnetic resonance imaging while they performed thought suppression blocks alternating with visual imagery blocks. The whole dataset was decomposed by group-independent component analysis into 30 components. After discarding noise components, the 20 valid components were subjected to further analysis of their temporal properties including task-relatedness and between-component residual correlation. RESULTS Combining a long task period and a data-driven approach, we observed a right-side-dominant, lateral frontoparietal network to be strongly suppression related. This network exhibited increased fluctuation during suppression, which is compatible with the well-known difficulty of suppression maintenance. CONCLUSIONS Between-network correlation provided further insight into the coordinated engagement of the executive control and dorsal attention networks, as well as the reciprocal activation of imagery-related components, thus revealing neural substrates associated with the rivalry between intrusive thoughts and the suppression process.
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Affiliation(s)
- Toshihiko Aso
- Human Brain Research CenterKyoto University Graduate School of MedicineKyotoJapan
| | | | - Takashi Kiyonaka
- Human Brain Research CenterKyoto University Graduate School of MedicineKyotoJapan
| | - Takaaki Aoki
- Institute of Economic ResearchKyoto UniversityKyotoJapan
| | | | - Masao Matsuhashi
- Human Brain Research CenterKyoto University Graduate School of MedicineKyotoJapan
| | | | - Hidenao Fukuyama
- Human Brain Research CenterKyoto University Graduate School of MedicineKyotoJapan
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46
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Ishii T, Sawamoto N, Tabu H, Kawashima H, Okada T, Togashi K, Takahashi R, Fukuyama H. Altered striatal circuits underlie characteristic personality traits in Parkinson's disease. J Neurol 2016; 263:1828-39. [PMID: 27334907 DOI: 10.1007/s00415-016-8206-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Revised: 06/11/2016] [Accepted: 06/12/2016] [Indexed: 11/29/2022]
Abstract
Patients with Parkinson's disease (PD) have been suggested to share personality traits characterised by low novelty-seeking and high harm-avoidance. Although a link between novelty-seeking and dopamine is hypothesised, the link is not fully supported by 6-[(18)F]fluoro-L-dopa positron emission tomography (PET) studies. Meanwhile, tractography studies with magnetic resonance imaging (MRI) link personality to the connectivity of the striatum in healthy subjects. Here, we investigated neurochemical and anatomical correlates of characteristic personality traits in PD. Sixteen PD patients and 28 healthy controls were assessed using the Temperament and Character Inventory. All patients and 17 randomly selected controls were scanned with 2β-carbomethoxy-3β-(4-fluorophenyl)-[N-(11)C-methyl]tropane ([(11)C]CFT) PET to measure striatal dopamine transporter availability. All subjects were scanned with MRI to evaluate the connectivity of the striatum using probabilistic tractography. PET findings revealed no correlation of novelty-seeking and harm-avoidance with [(11)C]CFT uptake in patients or controls. Novelty-seeking correlated positively with the connectivity strength of the striatum with the hippocampus and amygdala in both patients and controls. Harm-avoidance and the fibre connectivity strength of the striatum including ventral area with the amygdala correlated negatively in patients and positively in controls, which differed significantly between the groups. Our data support the notion that the fibre connectivity of the striatum with limbic and frontal areas underlies the personality profile. Furthermore, our findings suggest that higher harm-avoidance in PD is linked to alterations of the network, including the nucleus accumbens and amygdala.
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Affiliation(s)
- Toru Ishii
- Human Brain Research Center, Kyoto University Graduate School of Medicine, 54 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto, 606-8507, Japan
| | - Nobukatsu Sawamoto
- Human Brain Research Center, Kyoto University Graduate School of Medicine, 54 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto, 606-8507, Japan. .,Department of Neurology, Kyoto University Graduate School of Medicine, 53 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto, 606-8507, Japan. .,Department of Human Health Sciences, Kyoto University Graduate School of Medicine, 54 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto, 606-8507, Japan.
| | - Hayato Tabu
- Human Brain Research Center, Kyoto University Graduate School of Medicine, 54 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto, 606-8507, Japan.,Department of Neurology, Kyoto University Graduate School of Medicine, 53 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto, 606-8507, Japan
| | - Hidekazu Kawashima
- Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine, 54 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto, 606-8507, Japan
| | - Tomohisa Okada
- Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine, 54 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto, 606-8507, Japan
| | - Kaori Togashi
- Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine, 54 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto, 606-8507, Japan
| | - Ryosuke Takahashi
- Department of Neurology, Kyoto University Graduate School of Medicine, 53 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto, 606-8507, Japan
| | - Hidenao Fukuyama
- Human Brain Research Center, Kyoto University Graduate School of Medicine, 54 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto, 606-8507, Japan
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47
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Ueno T, Suzuki H, Hiraishi M, Amano H, Fukuyama H, Sugimoto N. In vivo Magnetic Resonance Microscopy and Hypothermic Anaesthesia of a Disease Model in Medaka. Sci Rep 2016; 6:27188. [PMID: 27251889 PMCID: PMC4890013 DOI: 10.1038/srep27188] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2016] [Accepted: 05/16/2016] [Indexed: 11/09/2022] Open
Abstract
In medical and pharmacological research, various human disease models in small fish, such as medaka (Oryzias latipes), have been created. To investigate these disease models noninvasively, magnetic resonance imaging (MRI) is suitable because these small fish are no longer transparent as adults. However, their small body size requires a high spatial resolution, and a water pool should be avoided to maximize the strength of MRI. We developed in vivo magnetic resonance microscopy (MR microscopy) without a water pool by combining hypothermic anaesthesia and a 14.1 T MR microscope. Using in vivo MR microscopy, we noninvasively evaluated the hepatic steatosis level of a non-alcoholic fatty liver disease model in medaka and followed the individual disease progression. The steatosis level was quantified by the MRI-estimated proton density fat-fraction (MRI-PDFF), which estimates the triglyceride fat concentration in liver tissue and is recognized as an imaging biomarker. The MRI-PDFF results agreed with a histological analysis. Moreover, we optimized the hypothermic anaesthesia procedure to obtain a recovery proportion of 1 in the experiment involving MR microscopy. Recovered medaka could not be distinguished from naïve medaka after the experiment. Therefore, the in vivo MR microscopy will expand the possibilities of a human disease model in fish.
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Affiliation(s)
- Tomohiro Ueno
- Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto 606-8507, Japan
| | - Hirokazu Suzuki
- Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto 606-8507, Japan
| | - Masahiro Hiraishi
- Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto 606-8507, Japan
| | - Hideaki Amano
- Human Health Sciences, Faculty of Medicine, Kyoto University, Kyoto 606-8507, Japan
| | - Hidenao Fukuyama
- Human Brain Research Center, Graduate School of Medicine, Kyoto University, Kyoto 606-8507, Japan
| | - Naozo Sugimoto
- Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto 606-8507, Japan
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Usami K, Matsumoto R, Sawamoto N, Murakami H, Inouchi M, Fumuro T, Shimotake A, Kato T, Mima T, Shirozu H, Masuda H, Fukuyama H, Takahashi R, Kameyama S, Ikeda A. Epileptic network of hypothalamic hamartoma: An EEG-fMRI study. Epilepsy Res 2016; 125:1-9. [PMID: 27295078 DOI: 10.1016/j.eplepsyres.2016.05.011] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2015] [Revised: 04/20/2016] [Accepted: 05/27/2016] [Indexed: 11/18/2022]
Abstract
OBJECTIVE To investigate the brain networks involved in epileptogenesis/encephalopathy associated with hypothalamic hamartoma (HH) by EEG with functional MRI (EEG-fMRI), and evaluate its efficacy in locating the HH interface in comparison with subtraction ictal SPECT coregistered to MRI (SISCOM). METHODS Eight HH patients underwent EEG-fMRI. All had gelastic seizures (GS) and 7 developed other seizure types. Using a general linear model, spike-related activation/deactivation was analyzed individually by applying a hemodynamic response function before, at, and after spike onset (time-shift model=-8-+4s). Group analysis was also performed. The sensitivity of EEG-fMRI in identifying the HH interface was compared with SISCOM in HH patients having unilateral hypothalamic attachment. RESULTS EEG-fMRI revealed activation and/or deactivation in subcortical structures and neocortices in all patients. 6/8 patients showed activation in or around the hypothalamus with the HH interface with time-shift model before spike onset. Group analysis showed common activation in the ipsilateral hypothalamus, brainstem tegmentum, and contralateral cerebellum. Deactivation occurred in the default mode network (DMN) and bilateral hippocampi. Among 5 patients with unilateral hypothalamic attachment, activation in or around the ipsilateral hypothalamus was seen in 3 using EEG-fMRI, whereas hyperperfusion was seen in 1 by SISCOM. SIGNIFICANCE Group analysis of this preliminary study may suggest that the commonly activated subcortical network is related to generation of GS and that frequent spikes lead to deactivation of the DMN and hippocampi, and eventually to a form of epileptic encephalopathy. Inter-individual variance in neocortex activation explains various seizure types among patients. EEG-fMRI enhances sensitivity in detecting the HH interface compared with SISCOM.
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Affiliation(s)
- Kiyohide Usami
- Department of Neurology, Kyoto University, Graduate School of Medicine, Kyoto, Japan
| | - Riki Matsumoto
- Department of Epilepsy, Movement Disorders and Physiology, Kyoto University, Graduate School of Medicine, Kyoto, Japan.
| | - Nobukatsu Sawamoto
- Department of Neurology, Kyoto University, Graduate School of Medicine, Kyoto, Japan; Human Brain Research Center, Kyoto University, Graduate School of Medicine, Kyoto, Japan
| | - Hiroatsu Murakami
- Department of Neurosurgery, Nishi-Niigata Chuo National Hospital, Niigata, Japan
| | - Morito Inouchi
- Department of Neurology, Kyoto University, Graduate School of Medicine, Kyoto, Japan; Department of Respiratory Medicine, Kyoto University, Graduate School of Medicine, Kyoto, Japan
| | - Tomoyuki Fumuro
- Research and Educational Unit of Leaders for Integrated Medical System, Kyoto University, Kyoto, Japan
| | - Akihiro Shimotake
- Department of Neurology, Kyoto University, Graduate School of Medicine, Kyoto, Japan
| | - Takeo Kato
- Department of Pediatrics, Kyoto University, Graduate School of Medicine, Kyoto, Japan
| | - Tatsuya Mima
- Human Brain Research Center, Kyoto University, Graduate School of Medicine, Kyoto, Japan
| | - Hiroshi Shirozu
- Department of Neurosurgery, Nishi-Niigata Chuo National Hospital, Niigata, Japan
| | - Hiroshi Masuda
- Department of Neurosurgery, Nishi-Niigata Chuo National Hospital, Niigata, Japan
| | - Hidenao Fukuyama
- Human Brain Research Center, Kyoto University, Graduate School of Medicine, Kyoto, Japan
| | - Ryosuke Takahashi
- Department of Neurology, Kyoto University, Graduate School of Medicine, Kyoto, Japan
| | - Shigeki Kameyama
- Department of Neurosurgery, Nishi-Niigata Chuo National Hospital, Niigata, Japan
| | - Akio Ikeda
- Department of Epilepsy, Movement Disorders and Physiology, Kyoto University, Graduate School of Medicine, Kyoto, Japan.
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49
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Votinov M, Aso T, Fukuyama H, Mima T. A Neural Mechanism of Preference Shifting Under Zero Price Condition. Front Hum Neurosci 2016; 10:177. [PMID: 27148024 PMCID: PMC4837161 DOI: 10.3389/fnhum.2016.00177] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2016] [Accepted: 04/07/2016] [Indexed: 11/17/2022] Open
Abstract
In everyday life, free products have a strong appeal to us, even if we do not need them. Behavioral studies demonstrated that people have a tendency to switch their preference from preferred more expensive products to less preferable, cheaper alternatives, when the cheaper option becomes free. However, the neural representation of this behavioral anomaly called “Zero price” is still unclear. Using fMRI, we studied subjects while they performed binary preference choice task for items with different prices. We found that zero-related change of preference was associated with activation of the choice network, which includes inferior parietal lobule (IPL), posterior cingulate cortex and medial prefrontal cortex. Moreover, the amount of activation in medial prefrontal cortex was positively correlated with the subjective happiness score of getting free products. Our findings suggest that the Zero-price effect is driven by affective evaluations during decision-making.
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Affiliation(s)
- Mikhail Votinov
- Human Brain Research Center, Kyoto University Graduate School of MedicineKyoto, Japan; Department of Psychiatry, Psychotherapy and Psychosomatics, Medical School, Rheinisch-Westfälische Technische Hochschule Aachen, Aachen UniversityAachen, Germany; Institute of Neuroscience and Medicine (INM-6), Research Center JuelichJuelich, Germany
| | - Toshihiko Aso
- Human Brain Research Center, Kyoto University Graduate School of Medicine Kyoto, Japan
| | - Hidenao Fukuyama
- Human Brain Research Center, Kyoto University Graduate School of Medicine Kyoto, Japan
| | - Tatsuya Mima
- Human Brain Research Center, Kyoto University Graduate School of MedicineKyoto, Japan; The Graduate School of Core Ethics and Frontier Sciences, Ritsumeikan UniversityKyoto, Japan
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50
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Chen Y, Shimotake A, Matsumoto R, Kunieda T, Kikuchi T, Miyamoto S, Fukuyama H, Takahashi R, Ikeda A, Lambon Ralph MA. The 'when' and 'where' of semantic coding in the anterior temporal lobe: Temporal representational similarity analysis of electrocorticogram data. Cortex 2016; 79:1-13. [PMID: 27085891 PMCID: PMC4884671 DOI: 10.1016/j.cortex.2016.02.015] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2015] [Revised: 12/18/2015] [Accepted: 03/01/2016] [Indexed: 10/28/2022]
Abstract
Electrocorticograms (ECoG) provide a unique opportunity to monitor neural activity directly at the cortical surface. Ten patients with subdural electrodes covering ventral and lateral anterior temporal regions (ATL) performed a picture naming task. Temporal representational similarity analysis (RSA) was used, for the first time, to compare spatio-temporal neural patterns from the ATL surface with pre-defined theoretical models. The results indicate that the neural activity in the ventral subregion of the ATL codes semantic representations from 250 msec after picture onset. The observed activation similarity was not related to the visual similarity of the pictures or the phonological similarity of their names. In keeping with convergent evidence for the importance of the ATL in semantic processing, these results provide the first direct evidence of semantic coding from the surface of the ventral ATL and its time-course.
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Affiliation(s)
- Y Chen
- Neuroscience and Aphasia Research Unit, School of Psychological Sciences, University of Manchester, Manchester, UK
| | - A Shimotake
- Department of Neurology, Graduate School of Medicine, Kyoto University, Japan
| | - R Matsumoto
- Department of Epilepsy, Movement Disorders and Physiology, Graduate School of Medicine, Kyoto University, Japan.
| | - T Kunieda
- Department of Neurosurgery, Graduate School of Medicine, Kyoto University, Japan
| | - T Kikuchi
- Department of Neurosurgery, Graduate School of Medicine, Kyoto University, Japan
| | - S Miyamoto
- Department of Neurosurgery, Graduate School of Medicine, Kyoto University, Japan
| | - H Fukuyama
- Human Brain Research Center, Graduate School of Medicine, Kyoto University, Japan
| | - R Takahashi
- Department of Neurology, Graduate School of Medicine, Kyoto University, Japan
| | - A Ikeda
- Department of Epilepsy, Movement Disorders and Physiology, Graduate School of Medicine, Kyoto University, Japan
| | - M A Lambon Ralph
- Neuroscience and Aphasia Research Unit, School of Psychological Sciences, University of Manchester, Manchester, UK.
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