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Electrophysiological studies on bifurcation sites of the dual projection neurons from the cat spinal dorsal horn


Sheng Li Xue Bao 38(3): 243-250
Electrophysiological studies on bifurcation sites of the dual projection neurons from the cat spinal dorsal horn
Neruons in the lumbosacral dorsal horn were doubly activated by antidromic stimulation of both the ipsilateral dorsal and dorsolateral funiculi in the cervical spinal cord. One of the antidromic responses of these neurons to dorsal and dorsolateral funicular stimulation disappeared when dissection between the two funiculi reached the segments of C7-T4. More chances of disappearance occurred in the responses to dorsal column stimulation than the responses in the dorsolateral side. Most of the threshold, refractory period, and latency recorded from the dorsal column side were higher than those in the dorsolateral funiculus. The results indicate that most of the neurons' axons bifurcate at the cervico-thoracic junction of the spinal cord and the diameter of most of their dorsolateral branches are larger than that of the dosal column branches.


Accession: 005349792

PMID: 3775406



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