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Science 5 April 1968:
Vol. 160. no. 3823, pp. 88 - 90
DOI: 10.1126/science.160.3823.88
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Articles

Voltage Noise in Limulus Visual Cells

F. A. Dodge Jr. 1, B. W. Knight 2, and J. Toyoda 3

1 IBM Research and Rockefeller University, New York, 10021
2 Cornell University Graduate School of Medical Sciences and Rockefeller University
3 Rockefeller University

Intracellular recordings from Limulus eccentric cells suggest that the generator potential arises from the superposition of numerous discrete fluctuations in membrane conductance. If this is so, a relation between frequency response to flickering light and noise characteristics under steady light may be predicted. This prediction is verified experimentally. If a discrete fluctuation model is assumed, the data indicate that increased light has two major effects: (i) the discrete events are strongly light-adapted to smaller size, and (ii) the time course of each event becomes briefer.


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Science. ISSN 0036-8075 (print), 1095-9203 (online)