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Ren Y, Chen P, Li Y, Zhou Z, Dong Y, Li S, Qian R, Yang J, Wu J, Yang W. Perceptual training improves audiovisual integration by enhancing alpha-band oscillations and functional connectivity in older adults. Cereb Cortex 2024; 34:bhae216. [PMID: 39183363 DOI: 10.1093/cercor/bhae216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2024] [Revised: 04/27/2024] [Accepted: 04/29/2024] [Indexed: 08/27/2024] Open
Abstract
Numerous studies on perceptual training exist, however, most have focused on the precision of temporal audiovisual perception, while fewer have concentrated on ability promotion for audiovisual integration (AVI). To investigate these issues, continuous 5-day audiovisual perceptual training was applied, during which electroencephalography was performed in response to auditory-only (A), visual-only (V) and audiovisual (AV) stimuli before and after training. The results showed that the perceptual sensitivity was greater for training group than for control group and was greater in the posttest than in the pretest. The response to the AV stimulus was significantly faster in the posttest than in the pretest for the older training group but was significantly greater for A and V stimuli for the younger training group. Electroencephalography analysis found higher P3 AVI amplitudes [AV-(A + V)] in the posttest than in the pretest for training group, which were subsequently reflected by an increased alpha (8-12 Hz) oscillatory response and strengthened global functional connectivity (weighted phase lag index). Furthermore, these facilitations were greater for older training groups than for younger training groups. These results confirm the age-related compensatory mechanism for AVI may be strengthened as audiovisual perceptual training progresses, providing an effective candidate for cognitive intervention in older adults.
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Affiliation(s)
- Yanna Ren
- Department of Psychology, College of Humanities and Management, Guizhou University of Traditional Chinese Medicine, No. 4, Dongqing Road, Huaxi District, Guiyang, 550025, China
| | - Peng Chen
- Department of Psychology, College of Humanities and Management, Guizhou University of Traditional Chinese Medicine, No. 4, Dongqing Road, Huaxi District, Guiyang, 550025, China
| | - Yan Li
- Department of Psychology, College of Humanities and Management, Guizhou University of Traditional Chinese Medicine, No. 4, Dongqing Road, Huaxi District, Guiyang, 550025, China
| | - Zhenhua Zhou
- Department of Psychology, College of Humanities and Management, Guizhou University of Traditional Chinese Medicine, No. 4, Dongqing Road, Huaxi District, Guiyang, 550025, China
| | - Yanping Dong
- Department of Psychology, College of Humanities and Management, Guizhou University of Traditional Chinese Medicine, No. 4, Dongqing Road, Huaxi District, Guiyang, 550025, China
| | - Shujing Li
- Department of Psychology, College of Humanities and Management, Guizhou University of Traditional Chinese Medicine, No. 4, Dongqing Road, Huaxi District, Guiyang, 550025, China
| | - Runqi Qian
- Department of Psychology, College of Humanities and Management, Guizhou University of Traditional Chinese Medicine, No. 4, Dongqing Road, Huaxi District, Guiyang, 550025, China
| | - Jiajia Yang
- Applied Brain Science Lab Interdisciplinary Science and Engineering in Health Systems, Okayama University, 1-1, Tsushimachu 1-chome, Kita-ku, Okayama, 7008530, Japan
| | - Jinglong Wu
- Research Center for Medical Artificial Intelligence, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, No. 1068, Xueyuan Avenue, Shenzhen University Town, Xili, Nanshan District, Shenzhen, 518055, China
| | - Weiping Yang
- Department of Psychology, Faculty of Education, Hubei University, No. 368, Youyi Avenue, Wuchang District, Wuhan, 430062, China
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Diana L, Casati C, Melzi L, Bianchi Marzoli S, Bolognini N. The effects of occipital and parietal tDCS on chronic visual field defects after brain injury. Front Neurol 2024; 15:1340365. [PMID: 38419713 PMCID: PMC10899507 DOI: 10.3389/fneur.2024.1340365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Accepted: 01/24/2024] [Indexed: 03/02/2024] Open
Abstract
Introduction Homonymous visual field defects (HVFDs) following acquired brain lesions affect independent living by hampering several activities of everyday life. Available treatments are intensive and week- or month-long. Transcranial Direct current stimulation (tDCS), a plasticity-modulating non-invasive brain stimulation technique, could be combined with behavioral trainings to boost their efficacy or reduce treatment duration. Some promising attempts have been made pairing occipital tDCS with visual restitution training, however less is knows about which area/network should be best stimulated in association with compensatory approaches, aimed at improving exploratory abilities, such as multisensory trainings. Methods In a proof-of-principle, sham-controlled, single-blind study, 15 participants with chronic HVFDs underwent four one-shot sessions of active or sham anodal tDCS applied over the ipsilesional occipital cortex, the ipsilesional or contralesional posterior parietal cortex. tDCS was delivered during a compensatory multisensory (audiovisual) training. Before and immediately after each tDCS session, participants carried out a visual detection task, and two visual search tasks (EF and Triangles search tests). Accuracy (ACC) and response times (RTs) were analyzed with generalized mixed models. We investigated differences in baseline performance, clinical-demographic and lesion factors between tDCS responders and non-responders, based on post-tDCS behavioral improvements. Lastly, we conducted exploratory analyses to compare left and right brain-damaged participants. Results RTs improved after active ipsilesional occipital and parietal tDCS in the visual search tasks, while no changes in ACC were detected. Responders to ipsilesional occipital tDCS (Triangle task) had shorter disease duration and smaller lesions of the parietal cortex and the superior longitudinal fasciculus. On the other end, on the EF test, those participants with larger damage of the temporo-parietal cortex or the fronto-occipital white matter tracts showed a larger benefit from contralesional parietal tDCS. Overall, the visual search RTs improvements were larger in participants with right-sided hemispheric lesions. Conclusion The present result shows the facilitatory effects of occipital and parietal tDCS combined with compensatory multisensory training on visual field exploration in HVFDs, suggesting a potential for the development of new neuromodulation treatments to improve visual scanning behavior in brain-injured patients.
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Affiliation(s)
- Lorenzo Diana
- Laboratory of Neuropsychology, Department of Neurorehabilitation Sciences, IRCCS Istituto Auxologico Italiano, Milan, Italy
| | - Carlotta Casati
- Laboratory of Neuropsychology, Department of Neurorehabilitation Sciences, IRCCS Istituto Auxologico Italiano, Milan, Italy
| | - Lisa Melzi
- Neuro-Ophthalmology Center and Ocular Electrophysiology Laboratory, IRCCS Istituto Auxologico Italiano, Milan, Italy
| | - Stefania Bianchi Marzoli
- Neuro-Ophthalmology Center and Ocular Electrophysiology Laboratory, IRCCS Istituto Auxologico Italiano, Milan, Italy
| | - Nadia Bolognini
- Laboratory of Neuropsychology, Department of Neurorehabilitation Sciences, IRCCS Istituto Auxologico Italiano, Milan, Italy
- Department of Psychology, University of Milano-Bicocca and NeuroMI, Milan, Italy
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Cheng W, Liu J, Jiang T, Li M. The application of functional imaging in visual field defects: a brief review. Front Neurol 2024; 15:1333021. [PMID: 38410197 PMCID: PMC10895022 DOI: 10.3389/fneur.2024.1333021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2023] [Accepted: 01/31/2024] [Indexed: 02/28/2024] Open
Abstract
Visual field defects (VFDs) represent a prevalent complication stemming from neurological and ophthalmic conditions. A range of factors, including tumors, brain surgery, glaucoma, and other disorders, can induce varying degrees of VFDs, significantly impacting patients' quality of life. Over recent decades, functional imaging has emerged as a pivotal field, employing imaging technology to illustrate functional changes within tissues and organs. As functional imaging continues to advance, its integration into various clinical aspects of VFDs has substantially enhanced the diagnostic, therapeutic, and management capabilities of healthcare professionals. Notably, prominent imaging techniques such as DTI, OCT, and MRI have garnered widespread adoption, yet they possess unique applications and considerations. This comprehensive review aims to meticulously examine the application and evolution of functional imaging in the context of VFDs. Our objective is to furnish neurologists and ophthalmologists with a systematic and comprehensive comprehension of this critical subject matter.
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Affiliation(s)
- Wangxinjun Cheng
- Department of Rehabilitation, The First Affiliated Hospital of Nanchang University, Nanchang, China
- Queen Mary College, Nanchang University, Nanchang, China
| | - Jingshuang Liu
- Department of Rehabilitation, The First Affiliated Hospital of Nanchang University, Nanchang, China
- Queen Mary College, Nanchang University, Nanchang, China
| | - Tianqi Jiang
- The First Clinical Medical College, Nanchang University, Nanchang, China
| | - Moyi Li
- Department of Rehabilitation, The First Affiliated Hospital of Nanchang University, Nanchang, China
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Alwashmi K, Meyer G, Rowe F, Ward R. Enhancing learning outcomes through multisensory integration: A fMRI study of audio-visual training in virtual reality. Neuroimage 2024; 285:120483. [PMID: 38048921 DOI: 10.1016/j.neuroimage.2023.120483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Revised: 11/18/2023] [Accepted: 12/01/2023] [Indexed: 12/06/2023] Open
Abstract
The integration of information from different sensory modalities is a fundamental process that enhances perception and performance in real and virtual environments (VR). Understanding these mechanisms, especially during learning tasks that exploit novel multisensory cue combinations provides opportunities for the development of new rehabilitative interventions. This study aimed to investigate how functional brain changes support behavioural performance improvements during an audio-visual (AV) learning task. Twenty healthy participants underwent a 30 min daily VR training for four weeks. The task was an AV adaptation of a 'scanning training' paradigm that is commonly used in hemianopia rehabilitation. Functional magnetic resonance imaging (fMRI) and performance data were collected at baseline, after two and four weeks of training, and four weeks post-training. We show that behavioural performance, operationalised as mean reaction time reduction in VR, significantly improves. In separate tests in a controlled laboratory environment, we showed that the behavioural performance gains in the VR training environment transferred to a significant mean RT reduction for the trained AV voluntary task on a computer screen. Enhancements were observed in both the visual-only and AV conditions, with the latter demonstrating a faster response time supported by the presence of audio cues. The behavioural learning effect also transfers to two additional tasks that were tested: a visual search task and an involuntary visual task. Our fMRI results reveal an increase in functional activation (BOLD signal) in multisensory brain regions involved in early-stage AV processing: the thalamus, the caudal inferior parietal lobe and cerebellum. These functional changes were only observed for the trained, multisensory, task and not for unimodal visual stimulation. Functional activation changes in the thalamus were significantly correlated to behavioural performance improvements. This study demonstrates that incorporating spatial auditory cues to voluntary visual training in VR leads to augmented brain activation changes in multisensory integration, resulting in measurable performance gains across tasks. The findings highlight the potential of VR-based multisensory training as an effective method for enhancing cognitive function and as a potentially valuable tool in rehabilitative programmes.
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Affiliation(s)
- Kholoud Alwashmi
- Faculty of Health and Life Sciences, University of Liverpool, United Kingdom; Department of Radiology, Princess Nourah bint Abdulrahman University, Saudi Arabia.
| | - Georg Meyer
- Digital Innovation Facility, University of Liverpool, United Kingdom
| | - Fiona Rowe
- Institute of Population Health, University of Liverpool, United Kingdom
| | - Ryan Ward
- Digital Innovation Facility, University of Liverpool, United Kingdom; School Computer Science and Mathematics, Liverpool John Moores University, United Kingdom
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Zhang N, Li C, Chen J, Liu X, Wang Z, Ni J. Research hotspots and frontiers about role of visual perception in stroke: A bibliometric study. Front Neurol 2022; 13:958875. [PMID: 36188385 PMCID: PMC9524359 DOI: 10.3389/fneur.2022.958875] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Accepted: 08/04/2022] [Indexed: 11/20/2022] Open
Abstract
Background Visual perception is a dynamic process of perceiving the environment through sensory input and transforming sensory input into meaningful concepts related to environmental visual knowledge. Many studies focusing on the role of visual perception after stroke have been published in various journals. However, a bibliometric analysis in the domain of visual perception after stroke is still lacking. This study aimed to deliver a visual analysis to analyze the global trends in research on the role of visual perception after stroke in the last 10 years. Methods The literature was derived from the Web of Science core collection database from 2012 to 2021. The collected material was limited to English articles and reviews. CiteSpace and Microsoft Excel were used for bibliographic analysis. Results A total of 298 articles were included in the analysis. The annual number of publications increased from 23 to 42 in the last decade. Rehabilitation was the main research hotspot (n = 85). Journal of Physical Therapy Science published the largest number of papers (n = 14). The most influential author, institution, and country were Rowe FJ (n = 17), League of European Research Universities (n = 45), and England (n = 54), respectively. The keywords with the longest burst period are field defect, hemineglect, disorder, and quality of life. Conclusion This study analyzes the papers on the role of visual perception after stroke in the past 10 years and provides a new perspective for research in this field. At present, the number of articles in this field is not large and the cooperation network is not close enough. In the future, it is necessary to strengthen the cooperation among various countries, institutions, and authors. In addition, large samples and randomized controlled trials are needed to identify the potential treatments and pathophysiology for visual perceptual impairment after stroke.
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Affiliation(s)
- Nannan Zhang
- Department of Rehabilitation Medicine, The First Affiliated Hospital, Fujian Medical University, Fuzhou, China
| | - Chong Li
- School of Kinesiology, Shanghai University of Sport, Shanghai, China
| | - Jianmin Chen
- Department of Rehabilitation Medicine, The First Affiliated Hospital, Fujian Medical University, Fuzhou, China
| | - Xiahua Liu
- Department of Rehabilitation Medicine, The First Affiliated Hospital, Fujian Medical University, Fuzhou, China
| | - Zhiyong Wang
- Department of Rehabilitation Medicine, The First Affiliated Hospital, Fujian Medical University, Fuzhou, China
- *Correspondence: Zhiyong Wang
| | - Jun Ni
- Department of Rehabilitation Medicine, The First Affiliated Hospital, Fujian Medical University, Fuzhou, China
- Jun Ni
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