Responses of retinal rods to single photons.

  title={Responses of retinal rods to single photons.},
  author={Denis A. Baylor and T. D. Lamb and King-Wai Yau},
  journal={The Journal of physiology},
1. A suction electrode was used to record the membrane current of single rod outer segments in pieces of toad retina. During dim illumination the membrane current showed pronounced fluctuations. 2. Amplitude histograms of responses to dim flashes of fixed intensity exhibited two discrete peaks, one at 0 pA and one near 1 pA, suggesting that the response was quantized. By setting a criterion amplitude level, flash responses could be classed as 'failures' (no response) or as 'successes' (at least… CONTINUE READING
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