PMID: 5921383Dec 2, 1966

Simple photoreceptors in Limulus polyphemus

R MillecchiaA Mauro


The "olfactory nerve," the endoparietal eye, and the rudimentary lateral eyes of Limulus (polyphemus) contain simple photoreceptor cells that duplicate many of the electrical responses of the retinular cells of the lateral eye; the responses are a receptor potential consisting of aninitial transient phase and a subsequent steady phase,low-amplitude fluctuations, and a small locally regenerative response to pulses of both light and current. Photic stimulation does not induce conducted action potentials, but does increase the membrane conductance. The receptor potentialrequires the presence of sodium ions in the external medium. Measurements of action and absorption spectra indicate a photopigment whose maximum absorption is of light with wavelength of 535 nanometers. The functional significance of these cells has not been ascertained.


Sep 12, 1971·Documenta Ophthalmologica. Advances in Ophthalmology·R M Glantz
Jan 1, 1972·Vision Research·R M Glantz
Aug 1, 1974·Comparative Biochemistry and Physiology. A, Comparative Physiology·A C WarehamK Bowler
May 1, 1968·The Journal of General Physiology·S Obara, H Grundfest
Oct 1, 1968·The Journal of General Physiology·A R Adolph
Sep 1, 1969·The Journal of General Physiology·A W ClarkA Mauro
Sep 1, 1969·The Journal of General Physiology·R Millecchia, A Mauro
Nov 1, 1969·The Journal of General Physiology·J Nolte, J E Brown
Feb 1, 1972·The Journal of General Physiology·J Nolte, J E Brown
Oct 1, 1978·The Journal of General Physiology·D S Bayer, R B Barlow
Feb 1, 1979·The Journal of General Physiology·J E Lisman, J A Strong
Jan 1, 1981·Progress in Biophysics and Molecular Biology·G L Fain, J E Lisman
Jan 1, 1991·The Journal of Comparative Neurology·K G Herman
Oct 24, 1973·Experimental Eye Research·G Duncan, F I Weeks
Nov 1, 1974·Experimental Eye Research·F I Weeks, G Duncan
Jun 3, 2016·Integrative and Comparative Biology·Alexandra C N Kingston, Thomas W Cronin
Jul 23, 2016·Integrative and Comparative Biology·B A Battelle
Jun 22, 1968·Nature·S H RipleyA Roberts
Jan 1, 1970·Zeitschrift für Zellforschung und mikroskopische Anatomie·W H Fahrenbach
Jan 1, 1971·Zeitschrift für Zellforschung und mikroskopische Anatomie·W H Fahrenbach

Related Concepts

Electrophysiology (Science)
Ocular Physiological Phenomena
Olfactory Nerve
Sensory Receptor Cells

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