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Functional somatotopy in sensorimotor cortex.

Martha Flanders1

  • 1Department of Neuroscience, University of Minnesota, Minneapolis, MN 55455, USA. fland001@umn.edu

Neuroreport
|February 25, 2005
PubMed
Summary
This summary is machine-generated.

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This review explores the distributed somatotopy of the primary motor cortex by comparing it to sensory areas. It suggests functional axes, like hand muscle synergies, may map to the cortex, but emphasizes flexibility.

Area of Science:

  • Neuroscience
  • Motor Control

Background:

  • The primary motor cortex exhibits a highly distributed somatotopy.
  • Sensory cortical areas (auditory, visual, somatosensory) display functional features overlaid on topographic maps.

Purpose of the Study:

  • To understand the distributed somatotopy of the primary motor cortex.
  • To draw principles from sensory cortical organization.

Main Methods:

  • Review of existing literature on sensory cortical areas.
  • Analysis of studies on hand muscle synergies.

Main Results:

  • Behaviorally important features/functions are mapped across multiple locations in sensory cortices.
  • Hand muscle synergies suggest potential two-dimensional functional axes for motor cortex mapping.

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Conclusions:

  • The organization of the primary motor cortex may involve functional axes mapped onto its surface.
  • Even functional somatotopy in the motor cortex is highly flexible.