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Related Experiment Videos

Premotor and parietal cortex: corticocortical connectivity and combinatorial computations

S P Wise1, D Boussaoud, P B Johnson

  • 1Laboratory of Neurophysiology, NIMH, Poolesville, Maryland 20837, USA.

Annual Review of Neuroscience
|January 1, 1997
PubMed
Summary

The dorsal premotor cortex receives more direct visual input than previously known, suggesting a key role in visuomotor control. This fronto-parietal network integrates various sensory data for movement execution.

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Area of Science:

  • Neuroscience
  • Primate Brain Research
  • Motor Control

Background:

  • The dorsal premotor cortex is a critical area in the primate frontal lobe.
  • Parietal input to this region was thought to originate mainly from the superior parietal lobule (area 5).

Purpose of the Study:

  • To investigate the extent of direct visual input to the dorsal premotor cortex.
  • To elucidate the functional connectivity within the fronto-parietal network for visuomotor control.

Main Methods:

  • Anatomical tracing studies in primates.
  • Analysis of parietal cortex connections with the extrastriate visual cortex.

Main Results:

  • Confirmed parietal input from the superior parietal lobule (area 5).

Related Experiment Videos

  • Identified novel projections from newly defined posterior parietal areas directly connected to the extrastriate visual cortex.
  • Established that the dorsal premotor cortex receives significantly more direct visual input than previously understood.

    • Conclusions:

    • The dorsal premotor cortex is a crucial component of a visuomotor control network.
    • This network integrates proprioceptive, visual, gaze, and attentional information.
    • The network's computations support the selection, preparation, and execution of movements.