Author:
HANITZSCH R.,KÜPPERS-TIEDT L.
Abstract
Afterpotentials of A-type horizontal cells (HCs) are believed to be
rod-induced. They are, however, complex potentials and evidently of
multiple causation. That part of the HC potential immediately after
light-off is not entirely rod-determined because it has the same spectral
sensitivity as the response to light-on, which is cone-induced with only
some rod influence. It persists during a strong blue adapting light, which
suppresses rod activity. The afterpotential may also be influenced by
feedback from HCs to photoreceptors. The later part of the afterpotentials
of A-type HCs is, however, rod dominated, as are the afterpotentials of
axon terminals of B-type HCs.
Publisher
Cambridge University Press (CUP)
Subject
Sensory Systems,Physiology