| ciliary muscle | <anatomy> The smooth muscle of the ciliary body; it consists of circular fibres (Muller's muscle) and radiating fibres (meridional fibres, or Brucke's muscle); action, in contracting, its diameter is reduced (like a sphincter), reducing tensile (stretching) forces on lens, allowing it to thicken for near vision (accommodation). Synonym: musculus ciliaris, Bowman's muscle, ciliary ligament. (05 Mar 2000) |
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| ciliary neurotrophic factor | <growth factor> Neurotrophic factor originally characterised as a survival factor for chick ciliary neurons in vitro. Subsequently shown to promote the survival of a variety of other neuronal cell types and to promote the differentiation of bipotential O2A progenitor cells to type 2 astrocytes in vitro. Molecular cloning and expression studies indicate that CNTF is a cytosolic protein. Developmental expression and regional distribution studies show that, unlike NGF, CNTF is not a target derived neurotrophic factor. (18 Nov 1997) |
| ciliary part of retina | ciliary part of retina |
| ciliary process | One of the radiating pigmented ridges, usually seventy in number, on the inner surface of the ciliary body, increasing in thickness as they advance from the orbiculus ciliaris to the external border of the iris; these, together with the folds (plicae) in the furrows between them, constitute the corona ciliaris. Synonym: processus ciliaris. (05 Mar 2000) |
| ciliary ring | The darkly pigmented posterior zone of the ciliary body continuous with the retina at the ora serrata. Synonym: ciliary disk, ciliary ring, pars plana. Origin: Mod. L. (05 Mar 2000) |
| ciliary staphyloma | Scleral staphyloma occurring in the region of the ciliary body. (05 Mar 2000) |
| ciliary veins | Several small veins, anterior and posterior, coming from the ciliary body. Synonym: venae ciliares. (05 Mar 2000) |
| ciliary wreath | The circular figure on the inner surface of the ciliary body, formed by the processes and folds (plicae) taken together. Synonym: ciliary crown, ciliary wreath. (05 Mar 2000) |
| ciliary zone | The outer, wider zone of the anterior surface of the iris, separated from the pupillary zone by the collarette. Synonym: zona ciliaris. (05 Mar 2000) |
| ciliary zonule | A series of delicate meridional fibres arising from the inner surface of the orbiculus ciliaris that run in bundles between, and in a very thin layer over, the ciliary processes; at the inner border of the corona, the fibres diverge into two groups that are attached to the capsule on the anterior and posterior surfaces of the lens close to the equator; the spaces between these two layers of fibres are filled with aqueous humor. Synonym: zonula ciliaris, apparatus suspensorius lentis, suspensory ligament of lens, Zinn's zonule. (05 Mar 2000) |
| pigmented layer of ciliary body | The continuation of the pigment layer of the retina onto the posterior aspect of the ciliary body. Synonym: pigmented layer of ciliary body. (05 Mar 2000) |
| motor root of ciliary ganglion | A branch of the oculomotor nerve supplying parasympathetic preganglionic nerve fibres to the ciliary ganglion. Synonym: radix parasympathica ganglii ciliaris, radix oculomotoria ganglii ciliaris, motor root of ciliary ganglion, oculomotor root of ciliary ganglion, radix brevis ganglii ciliaris, short root of ciliary ganglion. (05 Mar 2000) |
| sensory root of ciliary ganglion | Sensory fibres passing from the eyeball through the ciliary ganglion to their cell bodies in the trigeminal ganglion via the nasociliary nerve. Synonym: radix sensoria ganglii ciliaris, ramus communicans nervi nasociliaris cum ganglio ciliari, radix nasociliaris, long root of ciliary ganglion, nasociliary root, radix longa ganglii ciliaris. (05 Mar 2000) |
| short ciliary nerve | <anatomy, nerve> One of a number of branches of the ciliary ganglion, supplying the ciliary muscles, iris, and tunics of the eyeball. Synonym: nervus ciliaris brevis. (05 Mar 2000) |
| short posterior ciliary artery | <anatomy, artery> One of approximately seven branches of the ophthalmic artery which pass around the optic nerve to supply the eyeball. Dividing into some 15-20 branches, they penetrate the sclera adjacent to the optic nerve, supplying the choroid and ciliary processes. Anastomoses: with central retinal artery and long and anterior ciliary arteries (at the ora serrata). Synonym: arteria ciliaris posterior brevis. (05 Mar 2000) |