Synchronous development of motor cortical output to different muscles in the kitten

Exp Brain Res. 1980;40(3):349-53. doi: 10.1007/BF00237802.


Previous observations indicate that the output linkages from motor cortex (area 4) to triceps brachii motoneurons develop relatively late in the postnatal kitten. Responses in multiple, simultaneously-recorded EMG's from facial, forelimb and proximal hindlimb musculature to intracortical microstimulation appear over gestational days 107-111 (about 41 days postnatally). Thus, output from the motor cortex to alpha motoneurons develops in a synchronous, rather than a sequential manner across the area 4 homunculi.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Aging
  • Animals
  • Cats
  • Electric Conductivity
  • Electric Stimulation
  • Motor Cortex / growth & development
  • Motor Cortex / physiology*
  • Muscles / innervation*