MORPHOLOGY AND CONDUCTION OF BIPOLAR DORSAL ROOT GANGLION CELLS OF SELACHIAN FISHES

Publisher Website
Google Scholar
Abstract
Morphologic investigation of spinal ganglia in Raja inornata reveals that they are made up exclusively of bipolar cells. The large cells are covered with a myelin layer and, in addition, have a substantial endoneurial covering. Single shocks on peripheral nerves evoke conduction potentials on dorsal roots which show 3 modes of conduction speed 34, 14, and 8 meters/sec. Conduction proceeds either centripetally or centrifugally through the ganglia. Size distribution curves of vol. of cells, diam. of peripheral nerve fibers, and diams. of dorsal root fibers are given. The biologic implications of the substitution of the T-shaped cell for the bipolar cell in other classes are discussed.

This publication has 2 references indexed in Scilit: