WordNet
- relating to the ciliary body and associated structures of the eye
- of or relating to the human eyelash (同)ciliate
- of or relating to cilia projecting from the surface of a cell (同)ciliate, cilial
- small beltlike zone (同)zonula
PrepTutorEJDIC
- (目の)毛様体の / まつげの
- まつげ(eyelashes) / 繊毛
Wikipedia preview
出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2014/02/25 12:55:46」(JST)
[Wiki en表示]
| Zonule of Zinn |
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| Schematic diagram of the human eye. (Zonular fibers labeled at upper left.) |
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| The upper half of a sagittal section through the front of the eyeball. (Zonule of Zinn visible near center.) |
| Latin |
zonula ciliaris |
| Gray's |
subject #226 1018 |
The zonule of Zinn (Zinn's membrane, ciliary zonule) (after Johann Gottfried Zinn) is a ring of fibrous strands connecting the ciliary body with the crystalline lens of the eye.
Contents
- 1 Development
- 2 Anatomy
- 3 Clinical appearance
- 4 Additional Images
- 5 References
- 6 External links
Development[edit]
The ciliary epithelial cells of the eye probably synthesize portions of the zonules.[1]
Anatomy[edit]
The zonule of Zinn is split into two layers: a thin layer, which lines the hyaloid fossa, and a thicker layer, which is a collection of zonular fibers. Together, the fibers are known as the suspensory ligament of the lens.[2] The zonules are about 1–2 μ in diameter.[3]
When colour granules are displaced from the Zonules of Zinn (by friction against the lens), the irises slowly fade. In some cases those colour granules clog the channels and lead to Glaucoma Pigmentosa.
The zonules are primary made of fibrillin, a connective tissue protein.[1] Mutations in the fibrillin gene lead to the condition Marfans Syndrome, and consequences include an increased risk of lens dislocation.[1]
Clinical appearance[edit]
The zonules of Zinn are difficult to visualize using a slit lamp, but may be seen with exceptional dilation of the pupil, or if a coloboma of the iris or a suluxation of the lens is present.[4] The number of zonules present in a person appears to decrease with age.[3] The zonules insert around the outer margin of the lens (equator), both anteriorly and posteriorly.[5]
Additional Images[edit]
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Structures of the eye labeled
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This image shows another labeled view of the structures of the eye
References[edit]
- ^ a b c Kaufman, Paul L.; Alm, Albert (2010). Adler's physiology of the eye (11th ed. ed.). St. Louis, Mo: Mosby. pp. 145–146. ISBN 978-0-323-05714-1.
- ^ http://www.etsu.edu/cpah/hsci/forsman/WebVision.htm
- ^ a b Bornfeld, Norbert; Spitznas, Manfred; Breipohl, Winrich; Bijvank, Gerhard J. (1974). "Scanning electron microscopy of the zonule of Zinn". Albrecht von Graefes Archiv for Klinische und Experimentelle Ophthalmologie 192 (2): 117–129. doi:10.1007/BF00410698.
- ^ McCulloch, C (1954-1955). "The Zonule of Zinn: its Origin, Course, and Insertion, and its Relation to Neighboring Structures.". Transactions of the American Ophthalmological Society 52: 525–85. PMC 1312608. PMID 13274438. Retrieved 15 December 2012.
- ^ Farnsworth, PN; Mauriello, JA; Burke-Gadomski, P; Kulyk, T; Cinotti, AA (January 1976). "Surface ultrastructure of the human lens capsule and zonular attachments.". Investigative ophthalmology 15 (1): 36–40. PMID 1245377.
External links[edit]
- Diagram at unmc.edu
- Diagram at eye-surgery-uk.com
- Diagram and overview at webschoolsolutions.com
- ciliary+zonule at eMedicine Dictionary
- BU Histology Learning System: 08011loa
This article incorporates text from a public domain edition of Gray's Anatomy.
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Sensory system – visual system – globe of eye (TA A15.2.1–6, TH 3.11.08.0-5, GA 10.1005)
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| Fibrous tunic (outer) |
| Sclera |
- Episcleral layer
- Schlemm's canal
- Trabecular meshwork
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| Cornea |
- Limbus
- layers
- Epithelium
- Bowman's
- Stroma
- Descemet's
- Endothelium
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| Uvea/vascular tunic (middle) |
| Choroid |
- Capillary lamina of choroid
- Bruch's membrane
- Sattler's layer
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| Ciliary body |
- Ciliary processes
- Ciliary muscle
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| Iris |
- Stroma
- Pupil
- Iris dilator muscle
- Iris sphincter muscle
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| Retina (inner) |
| Layers |
- Inner limiting membrane
- Nerve fiber layer
- Ganglion cell layer
- Inner plexiform layer
- Inner nuclear layer
- Outer plexiform layer
- Outer nuclear layer
- External limiting membrane
- Layer of rods and cones
- Retinal pigment epithelium
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| Cells |
Photoreceptor cells (Cone cell, Rod cell) → (Horizontal cell) → Bipolar cell → (Amacrine cell) → Retina ganglion cell (Midget cell, Parasol cell, Bistratified cell, Giant retina ganglion cells, Photosensitive ganglion cell) → Diencephalon: P cell, M cell, K cell
Muller glia
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| Other |
- Macula
- Foveola
- Fovea centralis
- Parafovea
- Perifovea
- Optic disc
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| Anterior segment |
- Anterior chamber
- Aqueous humour
- Posterior chamber
- Lens
- Capsule of lens
- Zonule of Zinn
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| Posterior segment |
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| Other |
- Asthenopia
- Keratocytes
- Ocular immune system
- Tapetum lucidum
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anat (g/a/p)/phys/devp/prot
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proc, drug (S1A/1E/1F/1L)
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UpToDate Contents
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English Journal
- The Effect of Ultraviolet B on Fibrillin-1 and Fibrillin-2 in Human Non-pigmented Ciliary Epithelial Cells In Vitro.
- Shiroto Y1, Terashima S1, Hosokawa Y1, Oka K2, Isokawa K3, Tsuruga E1.
- Acta histochemica et cytochemica.Acta Histochem Cytochem.2017 Jun 26;50(3):105-109. doi: 10.1267/ahc.16036. Epub 2017 Jun 14.
- PMID 28744027
- Delineating the anatomy of the ciliary body using hybrid optical and photoacoustic imaging.
- Tserevelakis GJ1, Avtzi S1, Tsilimbaris MK2, Zacharakis G1.
- Journal of biomedical optics.J Biomed Opt.2017 Jun 1;22(6):60501. doi: 10.1117/1.JBO.22.6.060501.
- PMID 28613347
- Latent TGF-β binding protein 2 and 4 have essential overlapping functions in microfibril development.
- Fujikawa Y1,2, Yoshida H1,3, Inoue T1,4, Ohbayashi T5, Noda K6, von Melchner H7, Iwasaka T2, Shiojima I2, Akama TO1, Nakamura T1.
- Scientific reports.Sci Rep.2017 Mar 2;7:43714. doi: 10.1038/srep43714.
- PMID 28252045
Japanese Journal
- Morphological study of the accommodative apparatus in the monkey eye.
- Microfibril-Associated Glycoprotein-1 Controls Human Ciliary Zonule Development <i>In Vitro</i>
- Matrix Metalloproteinase-2 Degrades Fibrillin-1 and Fibrillin-2 of Oxytalan Fibers in the Human Eye and Periodontal Ligaments <i>In Vitro</i>
Related Links
- zonule [zōn´ūl] a small zone. ciliary zonule (zonule of Zinn) a series of fibers connecting the ciliary body and lens of the eye, holding the lens in place. Ciliary zonule. The system of suspensory ligaments holding the lens in position.
- ciliary zonule n. Any of a series of delicate meridional fibers arising from the inner surface of the ciliary disk and diverging into two groups that attach to the capsule of the eye on the anterior and posterior surfaces of the lens. Also ...
★リンクテーブル★
[★]
- 英
- apparatus suspensorius lentis, zonula ciliaris, ciliary zonule
- 関
- 毛様小帯
[★]
- 英
- ciliary zonule
- 関
- チン帯
[★]
- 関
- cilia、ciliary body、cilium
[★]