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Journal of Experimental Biology 56,695-702 (1972)
Published by Company of Biologists 1972

Electrotonic Conduction in the Optic Nerves of Planorbid Snails

MARION L. PATTON 1 and STANLEY B. KATER 1

1 Department of Zoology, University of Iowa, Iowa City, Iowa 52240

1. The conduction of information from the eyes of two basommatophoran snails has been investigated.

2. In the optic nerves of Helisoma trivolvis and Planorbis corneus a flash of light to the eye produces a procaine-insensitive DC potential that is graded with stimulus intensity and lasts as long as the stimulus.

3. The similar spectral sensitivities, time courses and latencies of the ERG and the slow wave of the optic nerve suggest that the DC response is a decrementally conducted receptor potential.

4. Superimposed on the DC shift are procaine-sensitive oscillations.

5. The oscillations may be either local or propagated regenerative events.

Submitted on November 12, 1971






© The Company of Biologists Ltd 1972