title: Selectivity in synaptic changes caudal to acute spinal cord transection.
abstract: The amplitude of monosynaptic EPSPs produced by the action of single semitendinosus (ST) Ia afferent fibers in ST motoneurons display little or no increase in amplitude within hours of a spinal cord transection performed at the thirteenth thoracic segment. This finding is in marked contrast to results obtained at the medial gastrocnemius (MG) Ia fiber-motoneuron synapse, where EPSPs have been shown to be enlarged, even in preparations with normal ST EPSPs. The increase in EPSP amplitude reported previously at the MG Ia-motoneurons synapse is selective and therefore is probably not a direct consequence of injury to the isolated segment of the spinal cord.
mesh_terms: D000208:Acute Disease; D000818:Animals; D002415:Cats; D002818:Cordotomy; D008564:Membrane Potentials; D009046:Motor Neurons / Q000502:physiology; D013116:Spinal Cord / Q000503:physiopathology*; D013119:Spinal Cord Injuries / Q000503:physiopathology*; D013569:Synapses / Q000502:physiology; D009435:Synaptic Transmission