An electrophysiological investigation of the projection of the intramedullary primary afferent cells of the lamprey ammocoete.
The intramedullary dorsal cells, whose peripheral processes form primary afferents, were identified in the lamprey ammocoete and were antidromically invaded by stimulation of their rostrally projecting intraneuraxial axons. Twenty-five out of 33 cells were found to project to the isthmus; conduction velocity was found to decrease in a rostral direction, suggesting that numerous collateral branches are given off as the axon ascends through the cord and brain stem.
Martin
R J
RJ
Department of Veterinary Pharmacology, Royal (Dick) School of Veterinary Studies, University of Edinburgh, Edinburgh, EH9 1QH Great Britain.
Bowsher
D
D