Raphé-produced excitation of spinal cord motoneurons in the cat

Neurosci Lett. 1989 Aug 28;103(2):185-90. doi: 10.1016/0304-3940(89)90573-9.


In all motoneurons examined, both flexor and extensor, raphé (pallidus) stimulation consistently produced an excitatory postsynaptic potential (EPSP). Upon interaction with a group Ia EPSP there was summation resulting in neuronal discharge. The raphé-induced EPSP also facilitated the initial segment-somadendritic coupling and hence the motoneuron excitability. These data support an excitatory role for raphé-spinal fibers on cat hindlimb motoneurons.

Publication types

  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Action Potentials
  • Animals
  • Cats
  • Electric Stimulation
  • Electrodes
  • Electrophysiology
  • Motor Neurons / physiology*
  • Raphe Nuclei / physiology*
  • Spinal Cord / physiology*
  • Synaptic Transmission*