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An MEG investigation of the neural mechanisms subserving complex visuomotor coordination

Kennedy, J. S., Singh, Krish Devi and Muthukumaraswamy, Suresh Daniel 2011. An MEG investigation of the neural mechanisms subserving complex visuomotor coordination. International Journal of Psychophysiology 79 (2) , pp. 296-304. 10.1016/j.ijpsycho.2010.11.003

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Abstract

Fifteen human participants performed a manual and ocular tracking task with a continuously and unpredictably moving visual target, while magnetoencephalography (MEG) signals were recorded. Three-dimensional source reconstructions were generated from the MEG signals, using synthetic aperture magnetometry (SAM). The SAM images indicated main effects of alpha band (8–15 Hz) and beta band (15–30 Hz) source power decreases, for manual tracking in the sensorimotor and parietal cortices, and for ocular tracking in the parietal and occipital cortices. Additionally, the manual tracking task evoked a clear, contralateral motor cortex response in the form of high gamma band (60–90 Hz) source power increases. Time-frequency spectrograms revealed the induced gamma band power increases were sustained for the duration of each ten second trial demonstrating these oscillations are not simply transients associated with movement onset. The onset of the gamma band response was characterised by higher initial onset power and frequency but no correlations were observed between oscillatory power and successful tracking performance.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Cardiff University Brain Research Imaging Centre (CUBRIC)
Psychology
Neuroscience and Mental Health Research Institute (NMHRI)
Subjects: B Philosophy. Psychology. Religion > BF Psychology
R Medicine > RC Internal medicine > RC0321 Neuroscience. Biological psychiatry. Neuropsychiatry
Uncontrolled Keywords: Motor cortex; Visuomotor control; Gamma band response; Magnetoencephalography; Neural oscillations
Publisher: Elsevier
ISSN: 0167-8760
Last Modified: 08 Aug 2019 20:39
URI: http://orca-mwe.cf.ac.uk/id/eprint/28381

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