Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 1989 Apr;102(1):39-46.
doi: 10.1016/0889-1605(89)90030-x.

A mechanism for spatial brightness contrast enhancement and a basis for the duplicity of vision

F S Sjöstrand  1
Affiliations

A mechanism for spatial brightness contrast enhancement and a basis for the duplicity of vision

F S Sjöstrand. J Ultrastruct Mol Struct Res. 1989 Apr.

Abstract

Cones are connected to bipolar cells connected to rods by processes extending laterally from the cone terminals (Sjöstrand, 1958). The cone connections have been studied further in the rabbit retina. Structurally these connections are typical synaptic connections. It can be deduced that these connections must affect the onresponses of bipolar cells connected to rods in such a way that spatial brightness contrast is enhanced. The connections raise the threshold for rod vision and slow down the changes in the membrane potential of on-bipolar cells. These effects offer an explanation for the duplicity of vision.

PubMed Disclaimer