Outer plexiform layer
The outer plexiform layer (external plexiform layer) is a layer of neuronal synapses in the retina of the eye. It consists of a dense network of synapses between dendrites of horizontal cells from the inner nuclear layer, and photoreceptor cell inner segments from the outer nuclear layer. It is much thinner than the inner plexiform layer, where amacrine cells synapse with retinal ganglion cells.[1]
| Outer plexiform layer | |
|---|---|
 Section of retina. (Outer plexiform layer labeled at right, sixth from the top.) | |
 Plan of retinal neurons. (Outer plexiform layer labeled at left, fourth from the bottom.) | |
| Details | |
| Identifiers | |
| Latin | Stratum plexiforme externum retinae |
| TA98 | A15.2.04.013 |
| FMA | 58685 |
| Anatomical terminology | |
The synapses in the outer plexiform layer are between the rod cell endings or cone cell branched foot plates and horizontal cells. Unlike in most systems, rod and cone cells release neurotransmitters when not receiving a light signal.
References
This article incorporates text in the public domain from page 1016 of the 20th edition of Gray's Anatomy (1918)
External links
- Histology image: 07902loa – Histology Learning System at Boston University
| Fibrous tunic (outer) |
|  1:posterior segment 2:ora serrata 3:ciliary muscle 4:ciliary zonules 5:Schlemm's canal 6:pupil 7:anterior chamber 8:cornea 9:iris 10:lens cortex 11:lens nucleus 12:ciliary process 13:conjunctiva 14:inferior oblique muscule 15:inferior rectus muscule 16:medial rectus muscle 17:retinal arteries and veins 18:optic disc 19:dura mater 20:central retinal artery 21:central retinal vein 22:optic nerve 23:vorticose vein 24:bulbar sheath 25:macula 26:fovea 27:sclera 28:choroid 29:superior rectus muscle 30:retina | |||||
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| Uvea / vascular tunic (middle) |
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| Retina (inner) |
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| Anatomical regions of the eye |
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