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Nerve fiber layer
From Wikipedia, the free encyclopedia
| Nerve fiber layer | |
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| Section of retina. (Stratum opticum labeled at right, second from the top.) | |
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| Plan of retinal neurons. (Stratum opticum labeled at left, second from the top.) | |
| Gray's | subject #225 1015 |
| Dorlands/Elsevier | l_05/12480766 |
The nerve fiber layer (or layer of nerve fibers or stratum opticum) is formed by the expansion of the fibers of the optic nerve; it is thickest near the porus opticus, gradually diminishing toward the ora serrata.
As the nerve fibers pass through the lamina cribrosa sclerae they lose their medullary sheaths and are continued onward through the choroid and retina as simple axis-cylinders.
When they reach the internal surface of the retina they radiate from their point of entrance over this surface grouped in bundles, and in many places arranged in plexuses.
Most of the fibers are centripetal, and are the direct continuations of the axis-cylinder processes of the cells of the ganglionic layer, but a few of them are centrifugal and ramify in the inner plexiform and inner nuclear layers, where they end in enlarged extremities.
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This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.