Experimental Physiology
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Quarterly Journal of Experimental Physiology 26.2 pp 97-112
© The Physiological Society 1936
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ON AMPHIBIAN RETINAL CURRENTS

W. A. Jolly 1

1 The Department of Physiology, University of Cape Town

The amphibian isolated eyeball mounted in the usual way in a moist dark chamber furnished with a camera shutter, in an oxygen atmosphere, was stimulated by flashes of light, 40 sgr in duration, from equal areas in different regions of the spectrum and the responses recorded by the string galvanometer.

The maximum response in the case of the initial positive deflection B of the electroretinogram was found to lie in the dark-adapted eye in the neighbourhood of 6350, and the maximum of the secondary elevation C in the neighbourhood of 5360 A.U.

Oscillations on the curve at a slow rate (below 3 per second) are described.

By experimental alterations of the condition of adaptation of the eye it is possible to conclude that the oscillation phenomenon, the B summit, and the dip between the B and C summits are together dependent on one retinal process, the C summit on another. The relations of the preliminary negative deflection A are undecided.

Submitted on March 10, 1936






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Copyright © 1936 by the The Physiological Society.