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Journal of Experimental Biology 107,293-310 (1983)
Published by Company of Biologists 1983

Electrical Potentials from the Regenerating Eye of Strombus

HOWARD L. GILLARY ¹

¹ Department of Physiology and Békésy Laboratory of Neurobiology, University of Hawaii, Honolulu, Hawaii 96822, U.S.A.

Following amputation of the eye of Strombus luhuanus, a morphologically equivalent one is regenerated. Early regenerates exhibited a relatively simple, single-peaked electroretinogram (ERG) that progressively matured to display two ‘on’ peaks, a ‘steady state’ during sustained illumination, and repetitive ‘off’ potentials. ERGs of regenerates were dependent on stimulus intensity, wavelength, light adaptation and temperature, as are those of mature eyes. Intracellularly recorded light-evoked depolarizations from retinas of early stages of regeneration tended to be simpler in waveform than those of more mature stages. In addition, certain cells exhibited light-evoked and electrically evoked action potentials, while others were hyperpolarized by light. Optic nerves of eyes in early stages of regeneration showed only ‘on’ activity, while those of later stages also exhibited ‘off’ responses.

Key words: Electrophysiology, eye, regeneration

Submitted on January 25, 1983
Accepted on May 6, 1983