Title: Differential contributions of PMv versus PMd during complex digit control
Authors: van den Berg, Femke
Swinnen, Stephan
Wenderoth, Nici # ×
Issue Date: 2012
Publisher: Cambridge University Press
Series Title: Journal of Physiology-London
Abstract: The premotor cortex consists of a dorsal (PMd) and a ventral part (PMv), which differ with respect to their anatomical connections as well as their function. Here we evaluated the involvement of both areas in complex digit control executed without vision. Right handed subjects performed complex unimanual and bimanual finger tapping, while transcranial magnetic stimulation was used to temporarily disrupt the PMv or PMd. In general, finger tapping was more frequently disrupted by PMv than by PMd stimulation. Additionally, hemispheric asymmetries differed between PMv and PMd in a task specific manner, such that unimanual tapping was more disrupted when the left PMv compared to the right was stimulated, whereas bimanual tapping was more frequently disturbed when the right PMd compared to the left was stimulated. Although it has been suggested that PMv is primarily involved in visuospatial tasks, the novel result of the present study is that PMv is also crucial for the performance of complex bimanual and unimanual finger tapping tasks not guided by vision. Thereby, the left more than the right PMv seems to be specialized for finger control of either hand in right-handed subjects. In contrast, the right PMd seems to be specialized for bimanual movement control.
ISSN: 0022-3751
Publication status: submitted
KU Leuven publication type: IT
Appears in Collections:Movement Control & Neuroplasticity Research Group
× corresponding author
# (joint) last author

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