Retina
| Delwedd:Retina1.jpg, SD-OCT Optic Disc Cross-Sections.png | |
| Enghraifft o: | golwg lliw, dosbarth o endidau anatomegol  |
|---|---|
| Math | layer of wall of eyeball, endid anatomegol arbennig |
| Rhan o | llygad, chorioretinal region |
| Cysylltir gyda | choroid, vitreous humour |
| Yn cynnwys | retinal cell |
| Dynodwyr | |
| Freebase | /M/0cycw |
| Thesawrws y BNCF | 5221 |
| UMLS CUI | C0035298 |
| Quora | Retinas |
 Ffeiliau perthnasol ar Gomin Wicimedia | |
Y retina (hefyd rhwyden) yw'r haen fwyaf mewnol o belen y llygad ac sy'n bilen oleusensitif amlhaenog dyner. Mae opteg y llygad yn creu delwedd o'r byd gweledol ar y retina (trwy'r cornbilen a'r lens), sy'n gweithio mewn ffordd nid annhebyg i ffilm mewn camera.
Mae'r golau sy'n taro'r retina yn creu rhaeadr o ddigwyddiadau cemegol a thrydanol sydd yn y pen draw yn achosi cynhyrfiadau nerfol. Mae rhain yn cael eu hanfon i wahanol ganolfannau gweledol yn yr ymenydd drwy ffibrau'r nerf optig. Mae'r retina nerfol fel arfer yn cyfeirio at dair haen o gelloedd nerfol (ffotodderbynyddion [rhodenni a chonau], celloedd deubegwn a chelloedd ganglion) o fewn i'r retina, tra fod y retina cyfan yn cyfeirio at yr haenau hyn ynghyd â haen o gelloedd epithelaidd pigmentog.[1]
Delweddau ychwanegol
-
Darlun o ddelwedd fel y caiff ei 'weld' gan y retina cyn iddo gael ei brosesu gan y nerf optig a'r cortecs rhychedig.
Cyfeiriadau
- ↑ J, Krause William (1 Gorffennaf 2005). Krause's Essential Human Histology for Medical Students (yn English). Boca Raton: Universal Publishers.CS1 maint: unrecognized language (link)
Darllen pellach
- S. Ramón y Cajal, Histologie du Système Nerveux de l'Homme et des Vertébrés, Maloine, Paris, 1911.
- Rodieck RW (1965). "Quantitative analysis of cat retinal ganglion cell response to visual stimuli". Vision Res. 5 (11): 583–601. doi:10.1016/0042-6989(65)90033-7. PMID 5862581.
- Wandell, Brian A. (1995). Foundations of vision. Sunderland, Mass: Sinauer Associates. ISBN 0-87893-853-2.
- "Functional architecture of the mammalian retina". Physiol. Rev. 71 (2): 447–480. 1991. PMID 2006220. https://archive.org/details/sim_physiological-reviews_1991-04_71_2/page/447.
- "The Retinome – Defining a reference transcriptome of the adult mammalian retina/retinal pigment epithelium". BMC Genomics 5 (1): 50. 2004. doi:10.1186/1471-2164-5-50. PMC 512282. PMID 15283859. http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=512282.
- Dowling, John (2007). "Retina". Scholarpedia 2 (12): 3487. Bibcode 2007SchpJ...2.3487D. doi:10.4249/scholarpedia.3487.
- Khoshbin-e-Khoshnazar, M.R. (2014). "Quantum Superposition in the Retina:Evidences and Proposals". NeuroQuantology 12 (1): 97–101. doi:10.14704/nq.2014.12.1.685.
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