Abstract:
:We investigated the spatio-temporal brain activity on the time scale of several milliseconds related to the mental rotation task requiring judgements of hand orientation, using a whole-cortex MEG (magnetoencephalography) system. Neuronal activity in the visual cortex was observed approximately 100-200 ms from stimulus onset, and that in inferior parietal lobe followed (after 200 ms). Both of these activities showed a contralateral dominance to visual stimulus hemifield. Premotor activity started later than the inferior parietal lobe activity, and these activities partially overlapped. Activity in primary motor and/or motosensory areas was observed in some subjects. The whole-cortex neuromagnetic measurements provided the time course of activity in the human brain associated with the implicit motor imagery: visual cortex-->inferior parietal lobe<-->premotor cortex. This process is considered to be the transformation process of retinotopic locations into a body-centered reference frame necessary for the mental rotation task.
journal_name
Neuroreportjournal_title
Neuroreportauthors
Kawamichi H,Kikuchi Y,Endo H,Takeda T,Yoshizawa Sdoi
10.1097/00001756-199804200-00031subject
Has Abstractpub_date
1998-04-20 00:00:00pages
1127-32issue
6eissn
0959-4965issn
1473-558Xjournal_volume
9pub_type
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