The afferent origin of the secondary somatosensory evoked potential from the lower limb in humans.
The afferent origin of the secondary somatosensory evoked potential elicited from stimulation of the sural and tibial nerves was investigated as the limb was cooled. It was hypothesized that the peak of this potential is initiated from primary afferents in the A alpha group. We conclude that the peak of the secondary SEP arises from an afferent source whose diameter is of similar size to that of large diameter A alpha afferents.
Nelson
A J
AJ
Human Neurophysiology Laboratory, Department of Human Biology and Nutritional Science, University of Guelph, Ontario, Canada N1G 2W1. anelson@sten.sunnybrook.on.ca
Brooke
J D
JD
McIlroy
W E
WE
Linklater
C M
CM
Staines
W R
WR
D000328:Adult; D000344:Afferent Pathways / Q000502:physiology*; D004576:Electromyography; D005073:Evoked Potentials, Somatosensory / Q000502:physiology*; D005260:Female; D006801:Humans; D007866:Leg / Q000294:innervation*; D008297:Male; D018482:Muscle, Skeletal / Q000294:innervation; D013497:Sural Nerve / Q000502:physiology*; D013696:Temperature; D013979:Tibial Nerve / Q000502:physiology*