Abstract:
:To investigate the nature of the visuomotor transformation, previous studies have used pointing tasks and examined how adaptation to a spatially localized mismatch between vision and proprioception generalizes across the workspace. Whereas some studies found extensive spatial generalization of single-point remapping, consistent with the hypothesis of a global realignment of visual and proprioceptive spaces, other studies reported limited transfer associated with variations in initial limb posture. Here, we investigated the effects of spatially localized remapping in the context of a visuomanual tracking task. Subjects tracked a visual target tracing a simple two-dimensional geometrical form without visual feedback except at a single point, where the visual display of the hand was shifted relative to its actual position. After adaptation, hand paths exhibited distortions relative to the visual templates that were inconsistent with the idea of a global realignment of visual and proprioceptive spaces. Results of a visuoproprioceptive matching task showed that these distortions were not limited to active movements but also affected perception of passive limb movements.
journal_name
J Neurophysioljournal_title
Journal of neurophysiologyauthors
Malfait N,Henriques DY,Gribble PLdoi
10.1152/jn.00507.2007subject
Has Abstractpub_date
2008-01-01 00:00:00pages
231-43issue
1eissn
0022-3077issn
1522-1598pii
00507.2007journal_volume
99pub_type
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