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Journal of Experimental Biology 122,193-208 (1986)
Published by Company of Biologists 1986

Ultraviolet Sensitivity and Spectral Opponency in the Locust

D. OSORIO ¹

¹ Department of Neurobiology, Research School of Biological Sciences, Australian National University, PO Box 475, Canberra, ACT 2601, Australia

Intracellular recordings in the medulla of the locust optic lobe reveal units showing u.v. sensitivity and spectral opponency. Previously only a single population of photoreceptors had been recorded in the locust retina, with peak sensitivity from 450-480 nm. Behavioural measurements show that the dorsal light response is elicited only by u.v. light, unlike the optomotor response whose spectral sensitivity is probably attributable to inputs from the green-sensitive cells. The possibility that the cells described may be involved in maintenance of level flight is discussed.

Key words: locust vision, optic lobe, chromatic opponency

Accepted on November 11, 1985

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