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The complexity of the afterpotential of rabbit A-type horizontal cells

Published online by Cambridge University Press:  30 January 2007

R. HANITZSCH  and
L. KÜPPERS-TIEDT
R. HANITZSCH
Affiliation:
Carl-Ludwig-Institute of Physiology, University of Leipzig, Leipzig, Germany
L. KÜPPERS-TIEDT
Affiliation:
Carl-Ludwig-Institute of Physiology, University of Leipzig, Leipzig, Germany
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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.

Keywords

AfterpotentialsAxon terminalsHorizontal cellsRabbit retinaSpectral sensitivity
Type
Research Article
Information
Visual Neuroscience , Volume 23 , Issue 6 , November 2006 , pp. 871 - 877
Copyright
© 2006 Cambridge University Press

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