Compensatory Eye Movements in Crabs
The eye movement control system of the crab provides opportunities for the study of a wide range of basic neurophysiological phenomena extending from receptor dynamics through central nervous integration to motor control. It is an almost unique preparation in that we can now make careful quantitative behavioral measurements simultaneously with electrophysiological sampling of the system at five different identifiable levels: the retinula cells, the lamina ganglion cells, higher-order neurons, motor neurons (MNs), and eye muscles. It is inevitable with such a system that many detailed observations obscure the main threads which run through the endeavors of different investigators over a period of more than a decade. It is the purpose of this chapter to review the progress made in this field since our first studies on the crab eye movements were made in 1961 (Sandeman, 1964; Horridge and Sandeman, 1964). I have attempted to present here what has been firmly established about the most relevant aspects of the system, and therefore much has been left out. All the information is readily available in the original publications.
KeywordsFast Phase Efference Copy Retinula Cell Optic Ganglion Optokinetic Response
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