Inner nuclear layer
Section ofretina. (Inner nuclear layer labeled at right, fifth from the top.)
Plan of retinal neurons. (Inner nuclear layer labeled at left, seventh from the top.)
Details
Identifiers
Latin	stratum nucleare internum retinae
TA98	A15.2.04.014
FMA	58686
Anatomical terminology [edit on Wikidata]

In theanatomy of theeye, theinner nuclear layer orlayer of inner granules, of theretina, is made up of a number of closely packed cells, of which there are three varieties:bipolar cells,horizontal cells, andamacrine cells.

Thebipolar cells, by far the most numerous, are round or oval in shape, and each is prolonged into an inner and an outer process.

They are divisible into rod bipolars and cone bipolars.

• The inner processes of therod bipolars run through theinner plexiform layer and arborize around the bodies of the cells of theganglionic layer; their outer processes end in the outer plexiform layer in tufts of fibrils around the button-like ends of the inner processes of the rod granules.
• The inner processes of thecone bipolars ramify in the inner plexiform layer in contact with the dendrites of the ganglionic cells.

Midget bipolars are linked to one cone whilediffuse bipolars take groups of receptors. Diffuse bipolars can take signals from up to 50 rods or can be a flat cone form and take signals from seven cones. The bipolar cells corresponds to the intermediary cells between the touch and heat receptors on the skin and the medulla or spinal cord.^[1]

Thehorizontal cells lie in the outer part of the inner nuclear layer and possess somewhat flattened cell bodies.

Their dendrites divide into numerous branches in the outer plexiform layer, while their axons run horizontally for some distance and finally ramify in the same layer.

Theamacrine cells are placed in the inner part of the inner nuclear layer, and are so named because they have not yet been shown to possess axis-cylinder processes.

Their dendrites undergo extensive ramification in the inner plexiform layer.

This article incorporates text in thepublic domain frompage 1016 of the 20th edition ofGray's Anatomy(1918)

• Histology image: 08008loa – Histology Learning System at Boston University
• Histology image: 07902loa – Histology Learning System at Boston University

• Human eye anatomy

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• Short description is different from Wikidata
• Wikipedia articles incorporating text from the 20th edition of Gray's Anatomy (1918)