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Iijima M, Orimo S, Terashi H, Suzuki M, Hayashi A, Shimura H, Kitagawa K, Okuma Y. Effects of istradefylline for quality of life in Parkinson's disease with freezing of gait: A singlearm, open-label, prospective, multicenter study. Parkinsonism Relat Disord 2020. [DOI: 10.1016/j.parkreldis.2020.06.264] [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: 11/25/2022]
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Takahashi M, Uchihara T, Yoshida M, Wakabayashi K, Kakita A, Takahashi H, Toru S, Orimo S. Clinical and pathological features affecting cardiac sympathetic denervation in autopsy-confirmed dementia with Lewy bodies. Eur J Neurol 2020; 27:1155-1163. [PMID: 32239599 DOI: 10.1111/ene.14240] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 01/22/2020] [Accepted: 03/09/2020] [Indexed: 12/01/2022]
Abstract
BACKGROUND AND PURPOSE The aim was to clarify the features affecting cardiac sympathetic denervation in autopsy-confirmed dementia with Lewy bodies (DLB) patients. METHODS Fifty-four autopsy-confirmed DLB patients were enrolled. Tissue samples of the left ventricular anterior wall were immunostained with anti-tyrosine hydroxylase antibody to identify catecholaminergic nerve axons. Immunostained areas were quantified as residual cardiac sympathetic nerve (CSN) axons and the relationship between the degree of residual CSN axons and clinical and neuropathological features was examined. RESULTS Virtually all patients showed small amounts of residual CSN axons (0.87%, range 0.02%-9.98%), with 50 patients (92.6%) showing <2.0% of residual axons. The patients who showed psychological symptoms within the first year of the disease had significantly more residual CSN axons than the remaining patients did (1.50% vs. 0.40%, P < 0.01). Patients with a short disease duration and neocortical-type Lewy body pathology tended to have more preserved CSN axons, although this difference was not statistically significant. Fifty-three patients (98.1%) who had neurofibrillary tangles in the brain and strong concomitant Alzheimer's disease pathology also had statistically significantly more preserved CSN axons. The patient with the most preserved CSN axons showed different characteristics from the results, except for the first symptom. CONCLUSION Psychological symptoms within the first year of the disease, a short disease duration, neocortical-type Lewy body pathology and strong concomitant Alzheimer's disease pathology may be related to mild CSN degeneration in DLB patients. Thus, DLB patients with broad Lewy body pathology in the brain in the early stages may show mild CSN degeneration.
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Affiliation(s)
- M Takahashi
- Department of Neurology, Kanto Central Hospital of the Mutual Aid Association of Public-School Teachers, Tokyo, Japan
| | - T Uchihara
- Laboratory of Structural Neuropathology, Tokyo Metropolitan Institute of Medical Science, Tokyo, Japan.,Department of Neurology, Nitobe-Memorial Nakano General Hospital, Tokyo, Japan
| | - M Yoshida
- Institute for Medical Science of Aging, Aichi Medical University, Aichi, Japan
| | - K Wakabayashi
- Department of Neuropathology, Institute of Brain Science, Hirosaki University Graduate School of Medicine, Aomori, Japan
| | - A Kakita
- Department of Pathology, Brain Research Institute, Niigata University, Niigata, Japan
| | - H Takahashi
- Department of Pathology, Brain Research Institute, Niigata University, Niigata, Japan
| | - S Toru
- Department of Neurology, Nitobe-Memorial Nakano General Hospital, Tokyo, Japan
| | - S Orimo
- Department of Neurology, Kanto Central Hospital of the Mutual Aid Association of Public-School Teachers, Tokyo, Japan
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Sawada H, Takahashi M, Inaba A, Kojo T, Orimo S. Relationship between cognitive dysfunction and striatal uptake of 123I-FP-CIT in patients with Parkinson’s disease. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.2060] [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: 11/27/2022]
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Iijima M, Orimo S, Terashi H, Suzuki M, Hayashi A, Shimura H, Mitoma H, Kitagawa K, Okuma Y. Efficacy of istradefylline for gait disorders in patients with Parkinson’s disease: A single-arm, prospective, multicenter, joint clinical study. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.994] [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: 11/16/2022]
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Takahashi M, Shinya A, Ito N, Takehumi S, Sekiguchi T, Inaba A, Orimo S. Laterality of body surface temperature in patients of acute brainstem infarction with Horner's syndrome. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.3109] [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: 11/30/2022]
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Uchihara T, Sango M, Takubo H, Komori T, Yoshimura N, Nohara C, Homma T, Wada A, Kodama M, Orimo S, Isozaki E, Kitagawa M, Hirokawa K, Toru S. Reduced MIBG uptake under relative preservation of cardiac sympathetic nerve in four autopsy patients of CBD-tau without lewy pathology. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.2947] [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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Sato T, Ramirez-Cuesta AJ, Daemen L, Cheng YQ, Tomiyasu K, Takagi S, Orimo S. Hydrogen release reactions of Al-based complex hydrides enhanced by vibrational dynamics and valences of metal cations. Chem Commun (Camb) 2016; 52:11807-11810. [PMID: 27709186 DOI: 10.1039/c6cc05199e] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Hydrogen release from Al-based complex hydrides composed of metal cation(s) and [AlH4]- was investigated using inelastic neutron scattering viewed from vibrational dynamics. The hydrogen release followed the softening of translational and [AlH4]- librational modes, which was enhanced by vibrational dynamics and the valence(s) of the metal cation(s).
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Affiliation(s)
- T Sato
- Institute for Materials Research, Tohoku University, Aoba, Sendai 980-8577, Japan
| | - A J Ramirez-Cuesta
- CEMD, Spallation Neutron Source, Neutron Sciences Directorate, Oak Ridge National Laboratory, Tennessee 37831, USA
| | - L Daemen
- CEMD, Spallation Neutron Source, Neutron Sciences Directorate, Oak Ridge National Laboratory, Tennessee 37831, USA
| | - Y-Q Cheng
- CEMD, Spallation Neutron Source, Neutron Sciences Directorate, Oak Ridge National Laboratory, Tennessee 37831, USA
| | - K Tomiyasu
- Department of Physics, Tohoku University, Aoba, Sendai 980-8578, Japan
| | - S Takagi
- Institute for Materials Research, Tohoku University, Aoba, Sendai 980-8577, Japan
| | - S Orimo
- Institute for Materials Research, Tohoku University, Aoba, Sendai 980-8577, Japan and WPI-Advanced Institute for Materials Research, Tohoku University, Aoba, Sendai 980-8577, Japan.
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Orimo S, Takahashi M, Kitazono H, Sekiguchi T, Inaba A, Ikemura M, Oka T, Uchihara T, Wakabayashi K, Kakita A, Takahashi H, Yoshida M, Tohru S, Kobayashi T. The degree of cardiac MIBG uptake is correlated with that of cardiac sympathetic denervation in pathologically-verified Lewy body disease. J Neurol Sci 2015. [DOI: 10.1016/j.jns.2015.08.985] [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: 10/22/2022]
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Hattori T, Orimo S, Hallett M, Wu T, Inaba A, Azuma R, Mizusawa H. Relationship and factor structure in multisystem neurodegeneration in Parkinson's disease. Acta Neurol Scand 2014; 130:347-53. [PMID: 25209841 DOI: 10.1111/ane.12273] [Citation(s) in RCA: 10] [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] [Accepted: 06/09/2014] [Indexed: 12/12/2022]
Abstract
OBJECTIVES Parkinson's disease (PD) is a multisystem neurodegenerative disease. We aimed to identify the relationship and factor structure among its different features. MATERIALS & METHODS Motor, olfactory and cognitive function, and cardiac sympathetic denervation were evaluated in 125 patients with PD using the Unified Parkinson's Disease Rating Scale (UPDRS) part III score, odor stick identification test for the Japanese (OSIT-J), Mini-Mental State Examination (MMSE), and [(123) I] meta-iodobenzylguanidine (MIBG) cardiac scintigraphy (heart-to-mediastinum (H/M) ratio). Pearson's correlation and multiple regression analysis were used to evaluate the association among the four measures with age, gender, and disease duration as the covariates. Exploratory factor analysis was used to identify the underlying factor structure among the measures and covariates. RESULTS Pearson's correlation and multiple regression analysis showed correlations between OSIT-J score and MIBG H/M ratio, OSIT-J and MMSE scores, UPDRS part III score and MIBG H/M ratio, UPDRS part III score and disease duration, and MMSE score and age. Factor analysis identified three factors: (i) age and MMSE score; (ii) MIBG H/M ratio and OSIT-J score; and (iii) UPDRS part III score and disease duration. CONCLUSIONS Our results suggest that aging, PD-related pathogenesis, and disease duration underlie the multisystem neurodegeneration present in PD. Moreover, age and disease duration are the major risk factors for cognitive impairment and motor symptoms, respectively. Olfactory impairment and cardiac sympathetic denervation are strongly associated in PD.
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Affiliation(s)
- T. Hattori
- Department of Neurology and Neurological Sciences; Graduate School; Tokyo Medical and Dental University; Tokyo Japan
- Department of Neurology; Kanto Central Hospital; Tokyo Japan
- Human Motor Control Section; National Institute of Neurological Disorders and Stroke; National Institutes of Health; Bethesda MD USA
| | - S. Orimo
- Department of Neurology; Kanto Central Hospital; Tokyo Japan
| | - M. Hallett
- Human Motor Control Section; National Institute of Neurological Disorders and Stroke; National Institutes of Health; Bethesda MD USA
| | - T. Wu
- Clinical Neurosciences Program; National Institute of Neurological Disorders and Stroke; National Institutes of Health; Bethesda MD USA
| | - A. Inaba
- Department of Neurology; Kanto Central Hospital; Tokyo Japan
| | - R. Azuma
- Department of Neurology; Kanto Central Hospital; Tokyo Japan
| | - H. Mizusawa
- Department of Neurology and Neurological Sciences; Graduate School; Tokyo Medical and Dental University; Tokyo Japan
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Sekiguchi T, Kanouchi T, Shibuya K, Noto YI, Yagi Y, Inabas A, Abe K, Misawa S, Orimo S, Kobayashi T, Kamata T, Nakagawa M, Kuwabara S, Mizusawa H, Yokota T. P537: Spreading of amyotrophic lateral sclerosis lesions – multifocal hits and local propagation? Clin Neurophysiol 2014. [DOI: 10.1016/s1388-2457(14)50635-9] [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: 11/26/2022]
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11
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Zhang Z, Nishimura H, Nishikino M, Sunahara A, Johzaki T, Cai H, Kawachi T, Pirozhkov A, Sagisaka A, Orimo S, Ogura K, Yogo A, Okano Y, Ohshima S, Fujioka S, Kiriyama H, Kondo K, Shimomura T, Kanazawa S. Efficient multi-keV X-ray generation from high-contrast laser plasma interaction. EPJ Web of Conferences 2013. [DOI: 10.1051/epjconf/20135918003] [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: 11/14/2022] Open
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Nishimura H, Zhang Z, Namimoto T, Fujioka S, Koga M, Shiraga H, Ozaki T, Iwawaki T, Morioka T, Morita K, Habara H, Tanaka K, Nishikino M, Kawachi T, Sagisaka A, Orimo S, Pirozhkov A, Ogura K, Yogo A, Kiriyama H, Kondo K, Shimomura T, Kanazawa S, Okano Y, Azechi H. Absolute Kα line spectroscopy for cone-guided fast-ignition targets. EPJ Web of Conferences 2013. [DOI: 10.1051/epjconf/20135913008] [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: 11/14/2022] Open
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Zhang Z, Nishimura H, Namimoto T, Fujioka S, Arikawa Y, Nishikino M, Kawachi T, Sagisaka A, Hosoda H, Orimo S, Ogura K, Pirozhkov A, Yogo A, Okano Y, Kiriyama H, Kondo K, Ohshima S, Azechi H. Quantitative measurement of hard x-ray spectra for high intensity laser produced plasma. Rev Sci Instrum 2012; 83:053502. [PMID: 22667617 DOI: 10.1063/1.4717677] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
X-ray line spectra ranging from 17 to 77 keV were quantitatively measured with a Laue spectrometer, composed of a cylindrically curved crystal and a detector. Either a visible CCD detector coupled with a CsI phosphor screen or an imaging plate can be chosen, depending on the signal intensities and exposure times. The absolute sensitivity of the spectrometer system was calibrated using pre-characterized laser-produced x-ray sources and radioisotopes. The integrated reflectivity for the crystal is in good agreement with predictions by an open code for x-ray diffraction. The energy transfer efficiency from incident laser beams to hot electrons, as the energy transfer agency for specific x-ray line emissions, is derived as a consequence of this work.
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Affiliation(s)
- Z Zhang
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka 565-0871, Japan.
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Orimo S, Uchihara T, Kanazawa T, Itoh Y, Wakabayashi K, Kakita A, Takahashi H. Unmyelinated axons are more vulnerable to degeneration than myelinated axons of the cardiac nerve in Parkinson's disease. Neuropathol Appl Neurobiol 2011; 37:791-802. [DOI: 10.1111/j.1365-2990.2011.01194.x] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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15
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Zhang Z, Nishikino M, Nishimura H, Kawachi T, Pirozhkov AS, Sagisaka A, Orimo S, Ogura K, Yogo A, Okano Y, Ohshima S, Fujioka S, Kiriyama H, Kondo K, Shimomura T, Kanazawa S. Efficient multi-keV x-ray generation from a high-Z target irradiated with a clean ultra-short laser pulse. Opt Express 2011; 19:4560-4565. [PMID: 21369288 DOI: 10.1364/oe.19.004560] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Kα line emissions from Mo and Ag plates were experimentally studied using clean, ultrahigh-intensity femtosecond laser pulses. The absolute yields of Kα x-rays at 17 keV from Mo and 22 keV from Ag were measured as a function of the laser pulse contrast ratio and irradiation intensity. Significantly enhanced Kα yields were obtained for both Mo and Ag by employing high contrast ratios and irradiances. Conversion efficiencies of 4.28×10⁻⁵/sr for Mo and 4.84×10⁻⁵/sr for Ag, the highest values obtained to date, were demonstrated with contrast ratios in the range 10⁻¹⁰ to 10⁻¹¹.
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Affiliation(s)
- Z Zhang
- Institute of Laser Engineering, Osaka University, Osaka, Japan.
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Shimura N, Takeichi T, Kume T, Sasaki S, Shimizu H, Ohmura A, Ikeda K, Nakamori Y, Orimo S. High pressure Raman and visible absorption study of AlH3. ACTA ACUST UNITED AC 2010. [DOI: 10.1088/1742-6596/215/1/012047] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Ikeda K, Muto S, Tatsumi K, Menjo M, Kato S, Bielmann M, Züttel A, Jensen CM, Orimo S. Dehydriding reaction of AlH3: in situ microscopic observations combined with thermal and surface analyses. Nanotechnology 2009; 20:204004. [PMID: 19420652 DOI: 10.1088/0957-4484/20/20/204004] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The dehydriding reaction of single-phase alpha- AlH3 was investigated by in situ microscopic observations combined with thermal and surface analyses. Before the dehydriding reaction, primary AlH3 particles of size 100 nm-1 microm were thought to be covered by an oxide layer with a thickness of less than 5 nm. Both the precipitation/grain-growth of metallic Al of size 1-50 nm and an increase in 'boundary space' were clearly observed inside the particles, while the morphologies of the particles covered by the layer did not change during the dehydriding reaction. This preliminary report provides fundamental information for a further study of AlH3 as a possible hydrogen storage material.
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Affiliation(s)
- K Ikeda
- Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
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Li HW, Miwa K, Ohba N, Fujita T, Sato T, Yan Y, Towata S, Chen MW, Orimo S. Formation of an intermediate compound with a B12H12 cluster: experimental and theoretical studies on magnesium borohydride Mg(BH4)2. Nanotechnology 2009; 20:204013. [PMID: 19420661 DOI: 10.1088/0957-4484/20/20/204013] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Experimental and theoretical studies on Mg(BH4)2 were carried out from the viewpoint of the formation of the intermediate compound MgB12H12 with B12H12 cluster. The full dehydriding and partial rehydriding reactions of Mg(BH4)2 occurred according to the following multistep reaction: Mg(BH4)2 -->1/6MgB12H12 + 5/6MgH2 + 13/6H2 <--> MgH2 + 2B + 3H2 <--> Mg + 2B + 4H2. The dehydriding reaction of Mg(BH4)2 starts at approximately 520 K, and 14.4 mass% of hydrogen is released upon heating to 800 K. Furthermore, 6.1 mass% of hydrogen can be rehydrided through the formation of MgB12H12. The mechanism for the formation of MgB12H12 under the present rehydriding condition is also discussed.
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Affiliation(s)
- H-W Li
- Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
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Choi IW, Kim CM, Sung JH, Yu TJ, Lee SK, Kim IJ, Jin YY, Jeong TM, Hafz N, Pae KH, Noh YC, Ko DK, Yogo A, Pirozhkov AS, Ogura K, Orimo S, Sagisaka A, Nishiuchi M, Daito I, Oishi Y, Iwashita Y, Nakamura S, Nemoto K, Noda A, Daido H, Lee J. Ion spectrometer composed of time-of-flight and Thomson parabola spectrometers for simultaneous characterization of laser-driven ions. Rev Sci Instrum 2009; 80:053302. [PMID: 19485501 DOI: 10.1063/1.3131628] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
An ion spectrometer, composed of a time-of-flight spectrometer (TOFS) and a Thomson parabola spectrometer (TPS), has been developed to measure energy spectra and to analyze species of laser-driven ions. Two spectrometers can be operated simultaneously, thereby facilitate to compare the independently measured data and to combine advantages of each spectrometer. Real-time and shot-to-shot characterizations have been possible with the TOFS, and species of ions can be analyzed with the TPS. The two spectrometers show very good agreement of maximum proton energy even for a single laser shot. The composite ion spectrometer can provide two complementary spectra measured by TOFS with a large solid angle and TPS with a small one for the same ion source, which are useful to estimate precise total ion number and to investigate fine structure of energy spectrum at high energy depending on the detection position and solid angle. Advantage and comparison to other online measurement system, such as the TPS equipped with microchannel plate, are discussed in terms of overlay of ion species, high-repetition rate operation, detection solid angle, and detector characteristics of imaging plate.
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Affiliation(s)
- I W Choi
- Advanced Photonics Research Institute and Center for Femto-Atto Science and Technology, GIST, Gwangju 500-712, Republic of Korea.
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Sato T, Ohoyama K, Noritake T, Miwa K, Li HW, Nakamori Y, Towata S, Orimo S. Structural investigation of metal borohydrides by X-ray/neutron diffraction and computational study. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308097328] [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: 11/10/2022] Open
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Ohmura A, Nakamori Y, Orimo S, Machida A, Aoki K. Infrared spectroscopy of aluminium trihydride α-AlH 3under high pressure. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308080483] [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: 11/10/2022] Open
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Buchter F, Łodziana Z, Remhof A, Friedrichs O, Borgschulte A, Mauron P, Züttel A, Sheptyakov D, Barkhordarian G, Bormann R, Chłopek K, Fichtner M, Sørby M, Riktor M, Hauback B, Orimo S. Structure of Ca(BD4)2 β-Phase from Combined Neutron and Synchrotron X-ray Powder Diffraction Data and Density Functional Calculations. J Phys Chem B 2008; 112:8042-8. [DOI: 10.1021/jp800435z] [Citation(s) in RCA: 86] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- F. Buchter
- Empa, Laboratory for Hydrogen & Energy, Swiss Federal Laboratories for Materials Testing and Research, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland, Laboratory for Neutron Scattering, ETH Zurich & Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland, GKSS-Research Center Geesthacht GmbH, WTP, Building 59, Max-Planck-Strasse 1, 21502 Geesthacht, Germany, Institute of Nanotechnology, Forschungszentrum Karlsruhe, P.O. Box 3640, D-76021 Karlsruhe, Germany, Institute for Energy Technology, P.O
| | - Z. Łodziana
- Empa, Laboratory for Hydrogen & Energy, Swiss Federal Laboratories for Materials Testing and Research, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland, Laboratory for Neutron Scattering, ETH Zurich & Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland, GKSS-Research Center Geesthacht GmbH, WTP, Building 59, Max-Planck-Strasse 1, 21502 Geesthacht, Germany, Institute of Nanotechnology, Forschungszentrum Karlsruhe, P.O. Box 3640, D-76021 Karlsruhe, Germany, Institute for Energy Technology, P.O
| | - A. Remhof
- Empa, Laboratory for Hydrogen & Energy, Swiss Federal Laboratories for Materials Testing and Research, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland, Laboratory for Neutron Scattering, ETH Zurich & Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland, GKSS-Research Center Geesthacht GmbH, WTP, Building 59, Max-Planck-Strasse 1, 21502 Geesthacht, Germany, Institute of Nanotechnology, Forschungszentrum Karlsruhe, P.O. Box 3640, D-76021 Karlsruhe, Germany, Institute for Energy Technology, P.O
| | - O. Friedrichs
- Empa, Laboratory for Hydrogen & Energy, Swiss Federal Laboratories for Materials Testing and Research, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland, Laboratory for Neutron Scattering, ETH Zurich & Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland, GKSS-Research Center Geesthacht GmbH, WTP, Building 59, Max-Planck-Strasse 1, 21502 Geesthacht, Germany, Institute of Nanotechnology, Forschungszentrum Karlsruhe, P.O. Box 3640, D-76021 Karlsruhe, Germany, Institute for Energy Technology, P.O
| | - A. Borgschulte
- Empa, Laboratory for Hydrogen & Energy, Swiss Federal Laboratories for Materials Testing and Research, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland, Laboratory for Neutron Scattering, ETH Zurich & Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland, GKSS-Research Center Geesthacht GmbH, WTP, Building 59, Max-Planck-Strasse 1, 21502 Geesthacht, Germany, Institute of Nanotechnology, Forschungszentrum Karlsruhe, P.O. Box 3640, D-76021 Karlsruhe, Germany, Institute for Energy Technology, P.O
| | - Ph. Mauron
- Empa, Laboratory for Hydrogen & Energy, Swiss Federal Laboratories for Materials Testing and Research, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland, Laboratory for Neutron Scattering, ETH Zurich & Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland, GKSS-Research Center Geesthacht GmbH, WTP, Building 59, Max-Planck-Strasse 1, 21502 Geesthacht, Germany, Institute of Nanotechnology, Forschungszentrum Karlsruhe, P.O. Box 3640, D-76021 Karlsruhe, Germany, Institute for Energy Technology, P.O
| | - A. Züttel
- Empa, Laboratory for Hydrogen & Energy, Swiss Federal Laboratories for Materials Testing and Research, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland, Laboratory for Neutron Scattering, ETH Zurich & Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland, GKSS-Research Center Geesthacht GmbH, WTP, Building 59, Max-Planck-Strasse 1, 21502 Geesthacht, Germany, Institute of Nanotechnology, Forschungszentrum Karlsruhe, P.O. Box 3640, D-76021 Karlsruhe, Germany, Institute for Energy Technology, P.O
| | - D. Sheptyakov
- Empa, Laboratory for Hydrogen & Energy, Swiss Federal Laboratories for Materials Testing and Research, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland, Laboratory for Neutron Scattering, ETH Zurich & Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland, GKSS-Research Center Geesthacht GmbH, WTP, Building 59, Max-Planck-Strasse 1, 21502 Geesthacht, Germany, Institute of Nanotechnology, Forschungszentrum Karlsruhe, P.O. Box 3640, D-76021 Karlsruhe, Germany, Institute for Energy Technology, P.O
| | - G. Barkhordarian
- Empa, Laboratory for Hydrogen & Energy, Swiss Federal Laboratories for Materials Testing and Research, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland, Laboratory for Neutron Scattering, ETH Zurich & Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland, GKSS-Research Center Geesthacht GmbH, WTP, Building 59, Max-Planck-Strasse 1, 21502 Geesthacht, Germany, Institute of Nanotechnology, Forschungszentrum Karlsruhe, P.O. Box 3640, D-76021 Karlsruhe, Germany, Institute for Energy Technology, P.O
| | - R. Bormann
- Empa, Laboratory for Hydrogen & Energy, Swiss Federal Laboratories for Materials Testing and Research, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland, Laboratory for Neutron Scattering, ETH Zurich & Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland, GKSS-Research Center Geesthacht GmbH, WTP, Building 59, Max-Planck-Strasse 1, 21502 Geesthacht, Germany, Institute of Nanotechnology, Forschungszentrum Karlsruhe, P.O. Box 3640, D-76021 Karlsruhe, Germany, Institute for Energy Technology, P.O
| | - K. Chłopek
- Empa, Laboratory for Hydrogen & Energy, Swiss Federal Laboratories for Materials Testing and Research, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland, Laboratory for Neutron Scattering, ETH Zurich & Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland, GKSS-Research Center Geesthacht GmbH, WTP, Building 59, Max-Planck-Strasse 1, 21502 Geesthacht, Germany, Institute of Nanotechnology, Forschungszentrum Karlsruhe, P.O. Box 3640, D-76021 Karlsruhe, Germany, Institute for Energy Technology, P.O
| | - M. Fichtner
- Empa, Laboratory for Hydrogen & Energy, Swiss Federal Laboratories for Materials Testing and Research, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland, Laboratory for Neutron Scattering, ETH Zurich & Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland, GKSS-Research Center Geesthacht GmbH, WTP, Building 59, Max-Planck-Strasse 1, 21502 Geesthacht, Germany, Institute of Nanotechnology, Forschungszentrum Karlsruhe, P.O. Box 3640, D-76021 Karlsruhe, Germany, Institute for Energy Technology, P.O
| | - M. Sørby
- Empa, Laboratory for Hydrogen & Energy, Swiss Federal Laboratories for Materials Testing and Research, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland, Laboratory for Neutron Scattering, ETH Zurich & Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland, GKSS-Research Center Geesthacht GmbH, WTP, Building 59, Max-Planck-Strasse 1, 21502 Geesthacht, Germany, Institute of Nanotechnology, Forschungszentrum Karlsruhe, P.O. Box 3640, D-76021 Karlsruhe, Germany, Institute for Energy Technology, P.O
| | - M. Riktor
- Empa, Laboratory for Hydrogen & Energy, Swiss Federal Laboratories for Materials Testing and Research, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland, Laboratory for Neutron Scattering, ETH Zurich & Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland, GKSS-Research Center Geesthacht GmbH, WTP, Building 59, Max-Planck-Strasse 1, 21502 Geesthacht, Germany, Institute of Nanotechnology, Forschungszentrum Karlsruhe, P.O. Box 3640, D-76021 Karlsruhe, Germany, Institute for Energy Technology, P.O
| | - B. Hauback
- Empa, Laboratory for Hydrogen & Energy, Swiss Federal Laboratories for Materials Testing and Research, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland, Laboratory for Neutron Scattering, ETH Zurich & Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland, GKSS-Research Center Geesthacht GmbH, WTP, Building 59, Max-Planck-Strasse 1, 21502 Geesthacht, Germany, Institute of Nanotechnology, Forschungszentrum Karlsruhe, P.O. Box 3640, D-76021 Karlsruhe, Germany, Institute for Energy Technology, P.O
| | - S. Orimo
- Empa, Laboratory for Hydrogen & Energy, Swiss Federal Laboratories for Materials Testing and Research, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland, Laboratory for Neutron Scattering, ETH Zurich & Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland, GKSS-Research Center Geesthacht GmbH, WTP, Building 59, Max-Planck-Strasse 1, 21502 Geesthacht, Germany, Institute of Nanotechnology, Forschungszentrum Karlsruhe, P.O. Box 3640, D-76021 Karlsruhe, Germany, Institute for Energy Technology, P.O
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Veltchev I, Tafo AG, Lin T, Fourkal E, Fan J, Li J, Yogo A, Orimo S, Ma C. SU-GG-T-525: Improved Proton Yield From a Laser-Proton Accelerator. Med Phys 2008. [DOI: 10.1118/1.2962274] [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: 11/07/2022] Open
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24
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Orimo S, Uchihara T, Nakamura A, Mori F, Kakita A, Wakabayashi K, Takahashi H. Axonal -synuclein aggregates herald centripetal degeneration of cardiac sympathetic nerve in Parkinson's disease. Brain 2008; 131:642-50. [DOI: 10.1093/brain/awm302] [Citation(s) in RCA: 338] [Impact Index Per Article: 21.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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25
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Yogo A, Daido H, Bulanov SV, Nemoto K, Oishi Y, Nayuki T, Fujii T, Ogura K, Orimo S, Sagisaka A, Ma JL, Esirkepov TZ, Mori M, Nishiuchi M, Pirozhkov AS, Nakamura S, Noda A, Nagatomo H, Kimura T, Tajima T. Laser ion acceleration via control of the near-critical density target. Phys Rev E Stat Nonlin Soft Matter Phys 2008; 77:016401. [PMID: 18351938 DOI: 10.1103/physreve.77.016401] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2007] [Indexed: 05/26/2023]
Abstract
Duration-controlled amplified spontaneous emission with an intensity of 10(13) W/cm(2) is used to convert a 7.5-microm -thick polyimide foil into a near-critical plasma, in which the p -polarized, 45-fs , 10(19) -Wcm (2) laser pulse generates 3.8-MeV protons, emitted at some angle between the target normal and the laser propagation direction of 45 degrees . Particle-in-cell simulations reveal that the efficient proton acceleration is due to the generation of a quasistatic magnetic field on the target rear side with magnetic pressure inducing and sustaining a charge separation electrostatic field.
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Affiliation(s)
- A Yogo
- Kansai Photon Science Institute, Japan Atomic Energy Agency (JAEA), Kyoto 619-0215, Japan
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26
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Ma C, Velchev I, Lin T, Fourkal E, Li J, Fan J, Orimo S, Ogura K. TU-C-AUD-04: Laser-Proton Acceleration for Radiation Therapy. Med Phys 2007. [DOI: 10.1118/1.2761353] [Citation(s) in RCA: 4] [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: 11/07/2022] Open
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27
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Velchev I, Lin T, Fourkal E, Fan J, Li J, Ma C, Orimo S, Ogura K. TH-C-M100F-02: Beam of Laser-Accelerated Protons: Generation and Characterization. Med Phys 2007. [DOI: 10.1118/1.2761680] [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: 11/07/2022] Open
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28
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Hayashi T, Tobita K, Nishio S, Ikeda K, Nakamori Y, Orimo S. Neutronics assessment of advanced shield materials using metal hydride and borohydride for fusion reactors. Fusion Engineering and Design 2006. [DOI: 10.1016/j.fusengdes.2005.09.060] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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29
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Hayashi Y, Fukumi A, Matsukado K, Mori M, Kotaki H, Kando M, Chen LM, Daito I, Kondo S, Kanazawa S, Yamazaki A, Ogura K, Nishiuchi M, Kado M, Sagisaka A, Nakamura S, Li Z, Orimo S, Homma T, Daido H. Estimation of photon dose generated by a short pulse high power laser. Radiat Prot Dosimetry 2006; 121:99-107. [PMID: 16410288 DOI: 10.1093/rpd/nci383] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
The authors obtain a new equation to estimate the forward component of a photon dose generated through the interaction between a target and a short pulse high power laser. As the equation is quite simple, it is useful for calculating the photon dose. The equation shows that the photon dose is proportional to the electron temperature in the range>3 MeV and proportional to the square of the electron temperature in the range<3 MeV. The dose estimated with this method is roughly consistent with the result of Monte Carlo simulation. With some assumptions and corrections, it can reproduce experimental results obtained and the dose result calculated at other laboratories.
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Affiliation(s)
- Y Hayashi
- Quantum Beam Science Directorate, Japan Atomic Energy Agency, 8-1 Umemidai, Kizu-cho, Souraku-gun, Kyoto 619-0215, Japan.
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30
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Togano K, Badica P, Nakamori Y, Orimo S, Takeya H, Hirata K. Superconductivity in the metal rich Li-Pd-B ternary boride. Phys Rev Lett 2004; 93:247004. [PMID: 15697851 DOI: 10.1103/physrevlett.93.247004] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2004] [Indexed: 05/24/2023]
Abstract
Superconductivity at about 8 K was observed in the metal-rich Li-Pd-B ternary system. Structural, microstructural, electrical, and magnetic investigations for various compositions proved that the Li2Pd3B compound, which has an antiperovskite cubic structure composed of distorted Pd6B octahedrons, is responsible for the superconductivity. This is the first observation of superconductivity in metal-rich ternary borides containing alkaline metal and Pd as a late transition metal. The compound prepared by arc melting has a high density and is relatively stable in the air. The upper critical fields H(c2)(0) estimated by linear extrapolation and the Werthamer-Helfand-Hohenberg theory are 6.2 and 4.8 T, respectively.
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Affiliation(s)
- K Togano
- Institute for Materials Research, Tohoku University, 2-1-1, Katahira, Aoba-ku, Sendai 980-8577, Japan.
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31
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Orimo S, Amino T, Tanaka H, Mitani K, Ishiwata K, Ishii K. A case of hemiparkinsonism following ischemic lesion of the contralateral substantia nigra: a PET study. Eur Neurol 2004; 51:175-7. [PMID: 15073443 DOI: 10.1159/000077666] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- S Orimo
- Department of Neurology, Kanto Central Hospital, Kami-Yoga, Tokyo, Japan.
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32
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Matsukado K, Esirkepov T, Kinoshita K, Daido H, Utsumi T, Li Z, Fukumi A, Hayashi Y, Orimo S, Nishiuchi M, Bulanov SV, Tajima T, Noda A, Iwashita Y, Shirai T, Takeuchi T, Nakamura S, Yamazaki A, Ikegami M, Mihara T, Morita A, Uesaka M, Yoshii K, Watanabe T, Hosokai T, Zhidkov A, Ogata A, Wada Y, Kubota T. Energetic protons from a few-micron metallic foil evaporated by an intense laser pulse. Phys Rev Lett 2003; 91:215001. [PMID: 14683311 DOI: 10.1103/physrevlett.91.215001] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2003] [Indexed: 05/24/2023]
Abstract
With detailed experimental studies and hydrodynamics and particle-in-cell simulations we investigate the role of the prepulse in laser proton acceleration. The prepulse or pedestal (amplified spontaneous emission) can completely evaporate the irradiated region of a sufficiently thin foil; therefore, the main part of the laser pulse interacts with an underdense plasma. The multiparametric particle-in-cell simulations demonstrate that the main pulse generates the quasistatic magnetic field, which in its turn produces the long-lived charge separation electrostatic field, accelerating the ions.
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Affiliation(s)
- K Matsukado
- National Institute of Radiological Science, Japan
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33
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Orimo S, Oka T, Miura H, Tsuchiya K, Mori F, Wakabayashi K, Nagao T, Yokochi M. Sympathetic cardiac denervation in Parkinson's disease and pure autonomic failure but not in multiple system atrophy. J Neurol Neurosurg Psychiatry 2002; 73:776-7. [PMID: 12438492 PMCID: PMC1757347 DOI: 10.1136/jnnp.73.6.776] [Citation(s) in RCA: 115] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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34
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Orimo S, Ozawa E, Yagi H, Ishizashi H, Matsumoto M, Fujimura Y. Simple plasma exchange reduced autoantibody to von Willebrand factor-cleaving protease in a Japanese man with ticlopidine-associated thrombotic thrombocytopenic purpura. J Intern Med 2002; 251:280-1. [PMID: 11886490 DOI: 10.1046/j.1365-2796.2002.00953.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Affiliation(s)
- N Sodeyama
- Department of Neurology, Kanto Central Hospital, Tokyo, Japan.
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Orimo S, Ozawa E. Short-term administration of an essential trace elements preparation (Elemenmic) causes a high whole blood manganese concentration and manganese deposition in basal ganglia. Intern Med 2001; 40:1162-3. [PMID: 11757777 DOI: 10.2169/internalmedicine.40.1162] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Affiliation(s)
- S Orimo
- The Department of Neurology, Kanto Central Hospital, Tokyo
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Orimo S, Ozawa E, Oka T, Nakade S, Tsuchiya K, Yoshimoto M, Wakabayashi K, Takahashi H. Different histopathology accounting for a decrease in myocardial MIBG uptake in PD and MSA. Neurology 2001; 57:1140-1. [PMID: 11571358 DOI: 10.1212/wnl.57.6.1140] [Citation(s) in RCA: 85] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- S Orimo
- Department of Neurology, Kanto Central Hospital, Tokyo, Japan.
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Orimo S, Ozawa E, Uematsu M, Yoshida E, Hino H, Yamada M, Okeda R, Mizusawa H. A case of Creutzfeldt-Jakob disease presenting with auditory agnosia as an initial manifestation. Eur Neurol 2001; 44:256-8. [PMID: 11096231 DOI: 10.1159/000008250] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- S Orimo
- Department of Neurology, Kanto Central Hospital, Tokyo Medical and Dental University, Tokyo, Japan.
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Orimo S, Fujii H, Matsushima T, Ito K, Fukunaga T. Nanostructured graphite-hydrogen system prepared by mechanical milling under hydrogen and argon atmospheres. ACTA ACUST UNITED AC 2000. [DOI: 10.1007/bf03028106] [Citation(s) in RCA: 5] [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: 11/30/2022]
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40
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Ishiai S, Koyama Y, Seki K, Orimo S, Sodeyama N, Ozawa E, Lee EY, Takahashi M, Watabiki S, Okiyama R, Ohtake T, Hiroki M. Unilateral spatial neglect in AD: significance of line bisection performance. Neurology 2000; 55:364-70. [PMID: 10932269 DOI: 10.1212/wnl.55.3.364] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND Unilateral spatial neglect has been rarely reported in patients with AD, although they often have right and left asymmetry of temporoparietal dysfunction. OBJECTIVE To investigate if patients with AD would show unilateral spatial neglect in the line bisection test, and to reveal the relationship between their neglect and the area of cerebral dysfunction. METHOD Thirty-two patients with mild to moderate AD and 32 age-matched healthy control subjects underwent an extensive line bisection test. SPECT was also obtained for the patients. RESULTS Rightward bisection errors exceeded the normal range in 25% of patients with AD. They exhibited greater rightward errors for the longer lines in the left hemispace than in the right hemispace, and with the right hand than with the left hand; this corresponds to the characteristics of neglect seen after right hemisphere lesions. All patients who bisected 200 mm lines with errors over 10 mm showed disproportionate lowering of performance IQ and asymmetric right hemisphere hypoperfusion, especially in the temporoparietal region. Seventy-five percent of the patients performed normally in the center presentation but erred slightly toward the body midline in the right and left hemispaces. CONCLUSION Left unilateral spatial neglect in mild to moderate AD may be rather common if tested with the line bisection test. Rightward errors over 10 mm suggest right temporoparietal dysfunction. In AD, three or more bisections of 200 mm lines in the center presentation are recommended for detection of neglect. Patients with AD but without neglect may have difficulty in shifting attention into the peripheral sector of the egocentric space.
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Affiliation(s)
- S Ishiai
- Department of Rehabilitation, Tokyo Metropolitan Institute for Neuroscience, Musashidai, Fuchu City, Tokyo, Japan.
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Abstract
OBJECTIVES (123)I-metaiodobenzylguanidine (MIBG) myocardial scintigraphy is clinically used to estimate local myocardial sympathetic nerve damage in some forms of heart disease, autonomic nerve disturbance in diabetic neuropathy, and disturbance of the autonomic nervous system in neurodegenerative disease. In the present study, examinations were performed to clarify (1) the proportion of cardiac sympathetic nerve disturbance in Parkinson's disease, (2) the usefulness of (123)I-MIBG myocardial scintigraphy to detect sympathetic nerve disturbances compared with autonomic function tests, (3) cardiac function in patients who have a decreased MIBG uptake in (123)I-MIBG myocardial scintigraphy, (4) the usefulness of (123)I-MIBG myocardial scintigraphy to differentiate Parkinson's disease from the other neurological diseases mimicking it. METHODS (123)I-MIBG myocardial scintigraphy was performed, together with autonomic function tests and cardiac examinations in 46 patients with Parkinson's disease and 25 patients with vascular parkinsonism, essential tremor, or multiple system atrophy. RESULTS In an anterior image study, the average count per pixel in heart to mediastinum (H/M) ratio decreased in 80% of the patients with Parkinson's disease in the early phase and 84% in the late phase. The mean H/M ratio in Parkinson's disease was significantly lower than that in controls and the other diseases. The H/M ratio tended to decrease with the disease progression. In almost half of the patients in Hoehn and Yahr stage I, the H/M ratio was already decreased. The sympathetic skin response in upper and lower limbs, head up tilt test, and coefficient of variation of R-R interval were abnormal in 17%, 31%, 30%, and 17% of the patients, respectively. All the patients with abnormal autonomic functions were in Hoehn and Yahr stage III, IV, or V. Echocardiography showed normal left ventricular function. Twenty four hour Holter electrocardiography detected no serious arrhythmias except for one patient with non-sustained ventricular tachycardia. CONCLUSION (123)I-MIBG myocardial scintigraphy might detect early disturbances of the sympathetic nervous system in Parkinson's disease and might give useful diagnostic information to differentiate vascular parkinsonism, essential tremor, and multiple system atrophy from Parkinson's disease.
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Affiliation(s)
- S Orimo
- Department of Neurology, 6- 25-1 Kami-Yoga, Setagaya-ku, Tokyo 158, Japan
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Orimo S, Ozawa E, Yasui H, Tanaka H, Tsuchiya K. [An autopsy case of multiple system atrophy presenting with rapid progression of autonomic disturbance]. No To Shinkei 1999; 51:263-7. [PMID: 10226292] [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] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
Abstract
We report an autopsy case of multiple system atrophy (MSA) presenting with rapid progression of autonomic disturbance. He was admitted to our hospital because of gait disturbance and dysarthria. The patient was a Japanese man, who first noticed gait disturbance and dysarthria at age 58, followed by syncope 3 months later. He developed urinary incontinence and frequency of urination 8 months after the disease onset. His gait disturbance, dysarthria, syncope, and urinary symptoms progressed, and he was admitted to the department of neurology 1 year after the onset of the disease. He was clinically diagnosed as having MSA and was followed in the outpatient office. He deteriorated rapidly and was readmitted to the department of neurology 19 months after the onset of the disease. Physical examination showed orthostatic hypotension. Neurological examination revealed nystagmus, dysarthria of cerebellar type, increased deep tendon reflexes, bilateral positive Babinski signs, ataxic and spastic gait, mild right hypesthesia and hypalgesia, impotence, constipation, and urinary incontinence. Routine blood examination showed slight anemia, elevated BUN, GOT, and blood sugar. Electrocardiography revealed sinus tachycardia and chest rentogenogram showed cardiac enlargement. Brain MRI showed atrophy of cerebellum and pons, and lacunae in basal ganglia. Autonomic function tests revealed abnormal in head-up tilt test, and CVR-R in May and November 1995. However 123I-MIBG myocardial scintigraphy showed normal uptake of MIBG in May 1995 and decreased uptake in November 1995. He deteriorated rapidly and died in May 1996. Autopsy findings revealed not only prominent olivopontocerebellar and slight striatonigral lesions, but also autonomic lesions with massive appearance of glial cytoplasmic inclusions. He was pathologically verified as having MSA. In the present patient, autonomic nervous system, especially cardiac sympathetic nerve, deteriorated rapidly, which might result in short duration of the illness.
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Affiliation(s)
- S Orimo
- Department of Neurology, Kanto Central Hospital, Tokyo, Japan
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Orimo S, Sato H, Ozawa E, Yasui H, Tuchiya K. [An autopsied case of purulent meningitis associated with ocular flutter]. No To Shinkei 1998; 50:469-72. [PMID: 9621372] [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] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
We report a 72-year-old autopsied case of purulent meningitis associated with ocular flutter. She was admitted to our hospital because of disturbances of consciousness and fever. Physical examination revealed fever, tachycardia, and tachypnea. Neurological examination showed disturbance of consciousness (Japan Coma Scale 30), agitated state, anisocoria, sluggish and fixed reaction of pupils to light, and nuchal stiffness. Routine blood examination showed leukocytosis, thrombocytopenia, positive CRP, and elevated myocardial enzymes. Cerebrospinal fluid revealed pleocytosis with predominant leukocytes, elevated protein, and decreased glucose (22% of blood glucose), and Streptococcus pneumoniae was proved in culture. Brain CT scan revealed no abnormal findings. Electrocardiography showed tachycardia, left axis deviation, and elevated ST segment in aVF, and V3-V6. Ultrasonic echocardiography revealed slight hypokinesis of the left anterior wall, septum, and apex. She was diagnosed as having purulent meningitis, myocarditis, probable encephalitis. Thus, antibiotics, acycrovir, glycerol, and aspirin were administrated. But her respiration deteriorated and ocular flutter was observed for 15 minutes. After that, She required artificial ventilation and eventually died after 29 hours the admission to our hospital. Pathological examination revealed leukocyte accumulation in the arachnoid space of the derebral surface, especially frontal and parietal lobes. Uncal herniation was not observed. The brainstem and cerebellum were histologically within normal limits. These findings suggest that ocular flutter observed in this patient was caused by functional damage of the brainstem.
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Affiliation(s)
- S Orimo
- Department of Neurology, Kanto Central Hospital, Tokyo, Japan
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Abstract
In 12 patients with the clinical characteristics of Marinesco-Sjögren syndrome including an autosomal recessive inheritance, congenital cataracts, mental retardation, cerebellar ataxia and progressive muscle weakness, the most common pathological finding was rimmed vacuole formation comprising from 0.1% to 10% of fibers in their muscle biopsy samples. The nuclear changes varied from condensed chromatin granules to vacuolation with amorphous inclusions which were predominantly seen in younger patients with prominent rimmed vacuoles, suggesting a close relationship between nuclear change and rimmed vacuole formation. From the severe destructive changes in nuclei, we speculated that the nuclear changes in Marinesco-Sjögren syndrome play a primary role in muscle degeneration resulting in myofibrillar disorganization and rimmed vacuole formation. In 2 patients, the TUNEL method demonstrated scattered myonuclei with fragmented DNA, but "ladder formation" was not found, probably because of the small numbers of nuclei with fragmented DNA. Nuclear degeneration with focal myofibrillar degeneration seen in these muscle samples suggests that the apoptotic process may occur in muscle disorders, especially in diseases with rimmed vacuole formation.
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Affiliation(s)
- Y Suzuki
- Department of Ultrastructural Research, National Center of Neurology and Psychiatry, Tokyo, Japan
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45
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Orimo S, Goto K, Ozawa E, Murota T. [Early recovery from locked-in syndrome due to brain infarction in a young patient with hypoplasia of bilateral vertebral arteries and a persistence of primitive trigeminal artery]. Rinsho Shinkeigaku 1996; 36:993-5. [PMID: 8958755] [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: 02/03/2023]
Abstract
A 36-year-old man was admitted to Kanto Chuo Hospital because of hearing loss and dysphagia. On admission physical and neurological findings revealed obesity, hypertension, nystagmus, right hearing loss, dysarthria, and dysphagia. Routine laboratory findings disclosed leukocytosis, liver dysfunction, hypercholesterolemia, proteinuria, and glucosuria. Immunological, coagulopathic, and endocrinological findings, electrocardiogram, echocardiogram, and brain CT scan were unremarkable. He was diagnosed as brainstem infarction, and then conservative therapies were begun. Seven hours after admission, he suddenly fell into coma and apneutic state, requiring artificial ventilation. The next day he was fully conscious, but could'nt make any voluntary movements except for vertical eye movements, suggesting locked-in syndrome (LIS). Brain MRI showed infarction of pons, medulla oblongata, and right cerebellum. Cerebral angiography revealed hypoplasia of bilateral vertebral arteries, a persistence of right primitive trigeminal artery (PTA), and retrograde blood flow of basilar artery from the PTA. Then he made a rapid recovery, and on 80th day he was discharged only with right hearing disturbance and mild left cerebellar sign. We speculated that hypoplasia of the bilateral vertebral arteries caused the brain infarction, and that back flow of the basilar artery from the PTA, in part, contributed to the early recovery from the LIS.
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Affiliation(s)
- S Orimo
- Department of Neurology, Kanto Chuo Hopital
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46
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Hase A, Orimo S, Arahata K. [Recent topics on inflammatory myositis]. Nihon Naika Gakkai Zasshi 1996; 85:123-8. [PMID: 8871321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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47
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Affiliation(s)
- H Mitoma
- Department of Neurology, Tokyo Medical and Dental University, Japan
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48
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Arahata K, Ishihara T, Fukunaga H, Orimo S, Lee JH, Goto K, Nonaka I. Inflammatory response in facioscapulohumeral muscular dystrophy (FSHD): immunocytochemical and genetic analyses. Muscle Nerve Suppl 1995:S56-S66. [PMID: 23573588] [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] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
To investigate the nature of the inflammatory response in facioscapulohumeral muscular dystrophy (FSHD), we analyzed mononuclear cells in muscle sections obtained from 18 FSHD patients and 8 controls. Monoclonal antibodies reactive for T cells, T cell subsets, B cells, and NK cells were used for cell typing. Macrophages were identified by acid phosphatase reaction. The localization of perforin, granzyme A, MHC-I and -II, dystrophin, and alpha-actinin antigens was also examined. We found that all FSHD patients, both familiar and sporadic cases, had greater amounts of mononuclear cellular infiltrates in muscle than controls, in whose specimens only few extra vascular mononuclear cells were counted. Seventy-two percent (13 of 18) of the patients had more than 50 inflammatory mononuclear cells per 1000 muscle fibers, and 33% (6 of 18) patients had numerous inflammatory cells exceeding 600 per 1000 muscle fibers (1835 +/- 482 SE). Nonnecrotic fibers invaded by mononuclear cells with either T8+, perforin+, or granzyme A+ were not observed in FSHD, while a few degenerating fibers were superficially invaded by T cells and macrophages. Occasional T cells were observed moving through the blood vessel wall. The increased number of necrotic fibers was paralleled by an increased number of inflammatory cells (r = 0.783, P = 0.0001). Genetic analysis, using the probes p13E11, pFR-1, D4S139, and D4S163, was done in 6 patients (3 familiar, 3 sporadic) who had numerous inflammatory infiltrates. These 6 patients had small (<28 kb) EcoRI fragments associated with the disease, and the disease was linked to 4q35. These results suggest that, in chromosome 4-linked FSHD: (1) inflammatory changes in muscle are a common histological feature; (2) mononuclear cellular infiltrates may enhance muscle fiber damage; but (3) T-cell-mediated cytotoxicity directed against muscle fibers is unlikely. We speculate that the immune effector mechanism in FSHD is different from that in previously reported inflammatory myopathies and Duchenne muscular dystrophy.
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Affiliation(s)
- K Arahata
- National Institute of Neuroscience (NCNP), Tokyo, Japan
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49
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Orimo S, Iwasaki T, Yoshino H, Arai M, Hiyamuta E. [An autopsied case of Fabry's disease presenting with parkinsonism and cardiomegaly as a cardinal clinical manifestation]. Rinsho Shinkeigaku 1994; 34:1003-7. [PMID: 7834942] [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: 01/27/2023]
Abstract
A 68-year-old male had been followed up under a clinical diagnosis of parkinsonism for 5 years. He was admitted to the Kanto Teishin Hospital with a chief complaint of difficulty in swallowing. Physical findings were almost normal. Neurological examination showed parkinsonism including mask-like face, positive Myerson's sign, mild rigidity, marche à petit pas, and retropulsion, and pyramidal signs including mild right hemiparesis, generalized hyperreflexia and positive Babinski's sign on both sides. Routine blood analysis was normal, except for elevated LDH level. He was found to have cardiac enlargement (CTR 58.7%) in chest roentogenogram, left ventricular hypertrophy (LVH), right bundle branch block and myocardial ischemia in electrocardiogram, as well as LVH, asymmetrical septal hypertrophy, mild MR and AR in echocardiogram. A T2 weighted brain MRI disclosed multiple high signal intensities in the basal ganglia and deep white matter regions which suggest parkinsonism resulting from multiple cerebral infarctions. An upper gastrointestinal endoscopic examination revealed esophageal and gastric carcinomas. He died of ventricular fibrillation 14 days after an operation of these carcinomas. Autopsy showed severe cardiomegaly (800 g) and vacuolar change of myocardium with lamellar body on electron microscopic examination. A definite biochemical diagnosis of Fabry's disease was made by demonstration of deposition of a large amount of trihexosylceramide in the myocardium, kidney, and liver. This case presented parkinsonism and cardiomegaly without typical signs of Fabry's disease. Therefore, Fabry's disease should be considered as one of possible underlying diseases, when a patient has cardiomegaly or ischemic cerebrovascular disease without risk factors, even if he has no typical signs of Fabry's disease.
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Affiliation(s)
- S Orimo
- Department of Neurology, Tokyo Medical and Dental University
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50
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Orimo S, Koga R, Goto K, Nakamura K, Arai M, Tamaki M, Sugita H, Nonaka I, Arahata K. Immunohistochemical analysis of perforin and granzyme A in inflammatory myopathies. Neuromuscul Disord 1994; 4:219-26. [PMID: 7919969 DOI: 10.1016/0960-8966(94)90022-1] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Perforin (PF) and granzyme A (GA) are candidates suspected of being cytolytic proteins of the granules of cytotoxic T lymphocytes (CTLs) and natural killer (NK) cells. We analysed PF and GA in muscles from patients with inflammatory myopathies. Five cases of polymyositis (PM), two cases of inclusion body myositis (IBM), and five cases of dermatomyositis (DM) were studied immunohistochemically using anti-PF and GA antibodies raised against each synthetic peptide of human PF and mouse GA, together with a panel of monoclonal antibodies reactive for lymphocyte subsets. In PM and IBM, PF positive cells were colocalized with GA positive cells and occasionally invaded into the non-necrotic muscle fibres. The percentage of PF positive cells among the endomysial CD8 positive cell population was 9.9% (PM) and 12.5% (IBM), and the majority of the endomysial CD8 positive cells were alpha/beta T cells. In contrast, in DM, both PF and GA positive cells were very few in all cases. Only few inflammatory cells were CD16+ or CD57+ NK cells among these diseases. Our results suggest that PF and GA are secreted mainly from alpha/beta T cells, and may play a key role in muscle fibre damage in at least some PM and IBM, but not in DM.
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Affiliation(s)
- S Orimo
- National Institute of Neuroscience, National Center of Neurology and Psychiatry (NCNP), Tokyo, Japan
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