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Parietal cortex area 5 and visuomotor behavior

J F Kalaska1

  • 1Département de physiologie, Faculté de médecine, Université de Montréal, OC, Canada.

Canadian Journal of Physiology and Pharmacology
|April 1, 1996
PubMed
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Area 5 of the parietal cortex plays a key role in sensorimotor guidance, contributing to arm movement representations and transformations for visually guided behavior.

Area of Science:

  • Neuroscience
  • Motor Control
  • Parietal Cortex

Background:

  • Traditionally, parietal cortex area 5 was considered solely a somatic sensory area.
  • Recent research challenges this view, suggesting area 5 neurons issue context-dependent motor commands.

Purpose of the Study:

  • To investigate the role of area 5 in sensorimotor transformations.
  • To understand how area 5 represents arm movements and postures.

Main Methods:

  • Electrophysiological recordings from alert, behaving monkeys during active movements.
  • Analysis of neuronal activity related to motor commands and sensory relevance.

Main Results:

  • Area 5 neurons generate representations of arm movement spatiotemporal form and posture.

Related Experiment Videos

  • Many area 5 cells receive centrally generated signals regarding the motor relevance of sensory information.
  • Area 5 contributes to somatomotor and visuomotor transformations.

    • Conclusions:

    • Area 5 is crucial for the sensorimotor guidance of motor behavior.
    • It plays a role in visually guided actions, though less directly than premotor cortex in response selection.