Responses from dorsal column nuclei (DCN) in the monkey to stimulation of upper and lower limbs and spinal cord.

Electroencephalography and Clinical Neurophysiology
A R MøllerC N Sen

Abstract

Responses from the dorsal surface of the exposed dorsal column nuclei (DCN) in baboons and a monkey (Macaca fascicularis) were recorded in response to electrical stimulation of the posterior tibial nerve at the ankle, the common peroneal nerve at the knee, the sciatic nerve, the spinal cord at T10, and the median nerve at the wrist. Recordings of far-field potentials from the vertex with a non-cephalic reference were made before exposing the DCN and simultaneously with recordings from the DCN. The response recorded from the DCN using a monopolar electrode to median nerve stimulation was a negative deflection (N wave) followed by a large and slow positive wave (P wave). The N wave was often preceded by a small positive deflection. The response from the median nerve to electrical stimulation of the DCN had the same latency as the initial positive peak and the initial portion of the N wave in the response from the DCN to stimulation of the median nerve, indicating that the initial positive peak was generated by presynaptic events in the DCN. The response recorded from the surface of the DCN to stimulation of the lower limbs consisted of many irregular waves followed by a large, positive deflection. Sometimes these irregular waves ...Continue Reading

References

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Citations

May 1, 1993·Brain Research. Brain Research Reviews·D F McLaughlin, E F Kelly
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Oct 17, 2007·Journal of Clinical Neurophysiology : Official Publication of the American Electroencephalographic Society·Hideaki IshibashiYoshio Okada

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