Abstract：
:Little is known about how the human brain keeps track of body parts in the visual field. Here we show that unattended images of right/left hands elicit a mismatch response when they violate a regularity established by repeated visual presentations of the other hand. In a visual oddball experiment we found mismatch responses to hands with unexpected laterality (e.g. left versus predicted right hand) in the periphery of the visual field. Unexpected left hands were processed predominantly in the contralateral superior parietal cortex, whereas unexpected right hands evoked differential activity in the contralateral superior parietal, ventral premotor, prefrontal and temporal areas, indicating a more elaborate automatic processing of the dominant hand. The amplitude of the differential activity to the right hand correlated with handedness test scores. Our results reveal the continuous monitoring of the left or right identity of hands, which is prerequisite to the ability to automatically transform observed actions into the observer's ego-centric spatial reference frame.
journal_name
Neuroimagejournal_title
NeuroImageauthors
Stefanics G,Czigler Idoi
10.1016/j.neuroimage.2012.06.068subject
Has Abstractpub_date
2012-10-15 00:00:00pages
253-61issue
1eissn
1053-8119issn
1095-9572pii
S1053-8119(12)00684-2journal_volume
63pub_type
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