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Related Experiment Videos

Exercise induces angiogenesis but does not alter movement representations within rat motor cortex.

Jeffrey A Kleim1, Natalie R Cooper, Penny M VandenBerg

  • 1Department of Psychology and Neuroscience, Canadian Centre for Behavioural Neuroscience, University of Lethbridge, 4401 University Dr., Lethbridge, Alberta T1K 3M4, Canada. jeffrey.kleim@uleth.ca

Brain Research
|April 9, 2002
PubMed
Summary

Voluntary exercise in rats increased blood vessel density in the motor cortex but did not change the map of forelimb movements. Exercise promotes angiogenesis without altering cortical topography.

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Area of Science:

  • Neuroscience
  • Exercise Physiology
  • Angiogenesis

Background:

  • The motor cortex controls voluntary movement and its representations can be modified by experience.
  • Exercise is known to induce structural and functional changes in the brain.

Purpose of the Study:

  • To investigate the impact of voluntary exercise on the spatial organization of forelimb movement representations and blood vessel density in the rat motor cortex.

Main Methods:

  • Adult male rats were divided into Voluntary eXercise (VX) and Inactive Condition (IC) groups for 30 days.
  • Movement representations were mapped using microelectrode stimulation of the motor cortex.
  • Blood vessel density was quantified in Layer V of the motor cortex.

Main Results:

Related Experiment Videos

  • Voluntary exercise led to significant increases in blood vessel density in Layer V of the motor cortex.
  • No significant differences in the size of distal (wrist/digit) or proximal (elbow/shoulder) forelimb movement representations were observed between VX and IC groups.
  • Despite increased cortical angiogenesis, the topography of forelimb movement representations remained unchanged.

Conclusions:

  • Increased motor activity through voluntary exercise can induce cortical angiogenesis in the rat forelimb motor cortex.
  • These exercise-induced vascular changes do not alter the fundamental topography of forelimb movement representations.