| ala temporalis | Strong squamous processes extending in a broad superolateral curve from the body of the sphenoid bone. The greater wing presents these suraces (facies): 1) cerebral surface: forms anterior third of the floor of the lateral portions of the middle cranial fossa; 2) temporal surface: forms the deepest portion of the temporal fossa; 3) infratemporal surface, forms the "roof" of the infratemporal fossa; 4) orbital surface: forms posterolateral wall of orbit. The greater wing forms the inferior border of the supraorbital fissure, and is perforated at its root by foramina rotundum ovale, and spinosum and the pterygoid canal. Synonym: ala major ossis sphenoidalis, ala temporalis. (05 Mar 2000) |
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| ala vespertilionis | An obsolete term for broad ligament of the uterus. Origin: L. Bat's wing (05 Mar 2000) |
| ala vomeris | An everted lip on either side of the upper border of the vomer, between which fits the rostrum of the sphenoid bone. Synonym: ala vomeris. (05 Mar 2000) |
| RNA, transfer, ala | A transfer RNA which is specific for carrying alanine to sites on the ribosomes in preparation for protein synthesis. (12 Dec 1998) |
| area centralis | An oval area of the sensory retina, 3 by 5 mm, temporal to the optic disk corresponding to the posterior pole of the eye; at its centre is the central fovea, which contains only retinal cones. Synonym: area centralis, macula lutea, macular area, punctum luteum, Soemmerring's spot, yellow spot. (05 Mar 2000) |
| arteria centralis brevis | <anatomy, artery> A branch of the precommunical part of the anterior cerebral artery. Synonym: arteria centralis brevis. (05 Mar 2000) |
| arteria centralis longa | <anatomy, artery> Arises at or just distal to the anterior communicating artery; distribution: anterior caudate and putamen and anterior limb of internal capsule. Synonym: arteria centralis longa, arteria recurrens, artery of Heubner, long central artery, recurrent artery of Heubner, recurrent artery. (05 Mar 2000) |
| arteria centralis retinae | A branch of the ophthalmic artery which penetrates the optic nerve 1 cm behind the eye to enter the eye at the optic papilla in the retina; it divides into superior and inferior temporal and nasal branches. Synonym: arteria centralis retinae, arteria retinae centralis, Zinn's artery. (05 Mar 2000) |
| arteria retinae centralis | A branch of the ophthalmic artery which penetrates the optic nerve 1 cm behind the eye to enter the eye at the optic papilla in the retina; it divides into superior and inferior temporal and nasal branches. Synonym: arteria centralis retinae, arteria retinae centralis, Zinn's artery. (05 Mar 2000) |
| arteria sulci centralis | <anatomy, artery> A branch of the terminal part of the middle cerebral artery distributed to the cortex on either side of the central sulcus. Synonym: arteria sulci centralis, artery of central sulcus, central artery, Rolandic artery. (05 Mar 2000) |
| canalis centralis medullae spinalis | The ependyma-lined lumen (cavity) of the neural tube, the cerebral part of which remains patent to form the ventricles of the brain, while the spinal part in the adult often is reduced to a solid strand of modified ependyma. Synonym: canalis centralis medullae spinalis, central canal of spinal cord, tubus medullaris. Synonym: syringocele. (05 Mar 2000) |
| vena centralis glandulae suprarenalis | The single draining vein of the gland; it receives a number of medullary veins; on the right side it empties directly into the inferior vena cava and on the left into the left renal vein. Synonym: vena centralis glandulae suprarenalis. (05 Mar 2000) |
| vena centralis retinae | Formed by union of the retinal veins and accompanies the artery of the same name in the optic nerve. Synonym: vena centralis retinae. (05 Mar 2000) |
| pars centralis | <anatomy, neurology> Pertaining to the brain, cranial nerves and spinal cord. It does not include muscles or peripheral nerves. In invertebrates, the central nervous system is composed of the segmental ganglia of the ventral nerve cord together with the fused ganglia or brain at the anterior end. Acronym: CNS (12 Jan 1998) |
| pars centralis ventriculi lateralis | The body of the lateral ventricle of the brain, extending from the interventricular foramen (of Monro) to the collateral trigone (i.e., junction of posterior and inferior horns). Synonym: cella media. (05 Mar 2000) |