Possible model for generation of P9 far-field potentials.
The distribution of P9 far-field somatosensory evoked potentials, after stimulation of the median nerve with a knee reference, was examined to determine the mechanism of the generation of P9 potentials. In addition to positive potentials (P9s), we found a negative potential (N9) recorded from the chest ipsilateral to the stimulation. The simulation of the distribution of these P9/N9 potentials by an electrical circuit diagram suggested the validity of this model for generation of the P9s.
Hashimoto
S
S
Department of Neurology, Tenri Hospital, Nara, Japan.
Kawamura
J
J
Segawa
Y
Y
Yamamoto
T
T
Nakamura
M
M
D004558:Electric Stimulation; D005073:Evoked Potentials, Somatosensory; D006801:Humans; D008475:Median Nerve / Q000502:physiology