An Electrophysiological Study of the Anatomical Relations of Two Giant Nerve Cells in Aplysia Depilans

Abstract

Histological studies of the central nervous system of invertebrates using methylene-blue and silver-staining techniques, alone or in conjunction with degeneration experiments, have provided a considerable amount of information about neuronal pathways. The use of electrophysiological methods, however, makes it easier to trace the path of individual neurones over long distances and can be especially helpful in invertebrates where the path of an axon is complicated by its passage through the neuropiles. In addition, they may give some insight into the types of functional connexion which exist between neurones.