Abstract
1. The proximal negative response (PNR) of the inner plexiform layer of the pigeon retina was recorded intraretinally.
2. The PNR can be distinguished from the local b-wave by its area dependence, and its depth profile in the retina.
3. The `on' and `off' transients of the PNR have differing depth profiles in the retina: the `on' transient is distributed vitreal to the `off', and both are distributed vitreal to the b-wave.
4. As spot diameter is increased, so the amplitude of the PNR decreases, and the threshold rises.
5. Ganglion cells fire at `on' and `off' during the PNR and like the PNR, are suppressed as spot size is increased.
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Selected References
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