On-Bipolar Cells, Visual Sensitivity and the b-Wave
It has been known for some time from psychophysical observations that the visual system can perform as a near-ideal detector of light, capable of detecting the absorption of a few photons. This high sensitivity is generated in the retina; rods respond to single photons and there is a large amplification at the synapse with some bipolar cells (Ashmore & Falk 1976; 1980). The absorption of a photon within the receptive field of a ganglion cell of a dark-adapted retina has a high probability of eliciting extra impulses in that ganglion cell (Barlow, Levick & Yoon 1971).
KeywordsGlutamate Receptor Guanylate Cyclase Bipolar Cell Voltage Gain Visual Sensitivity
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