| retina | Light sensitive layer of the eye. In vertebrates, looking from outside, there are four major cell layers: (i) the outer neural retina, which contains neurons (ganglion cells, amacrine cells, bipolar cells) as well as blood vessels, (ii) the photoreceptor layer, a single layer of rods and cones, (iii) the pigmented retinal epithelium (PRE or RPE), (iv) the choroid, composed of connective tissue, fibroblasts and including a well vascularised layer, the chorio capillaris, underlying the basal lamina of the PRE. Behind the choroid is the sclera, a thick organ capsule. In molluscs (especially cephalopods such as the squid) the retina has the light sensitive cells as the outer layer with the neural and supporting tissues below. See: retinal rods, retinal cones, rhodopsin. (18 Nov 1997) |
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| retina-specific amine oxidase | <enzyme> Genbank d88213 Registry number: EC 1.4.- Synonym: rao enzyme, human (26 Jun 1999) |
| retinacula musculorum fibularium | An alternate term for peroneal retinaculum, peroneal retinaculum. (05 Mar 2000) |
| retinacula musculorum peroneorum | Superior and inferior fibrous bands retaining the tendons of the peroneus longus and brevis in position as they cross the lateral side of the ankle. Synonym: retinacula musculorum peroneorum, retinacula musculorum fibularium, retinacula of peroneal muscles. (05 Mar 2000) |
| retinacula of extensor muscles | See: inferior extensor retinaculum, superior extensor retinaculum. (05 Mar 2000) |
| retinacula of nail | Fibrous attachments of the nail-bed to the underlying phalanx. Synonym: retinacula unguis. (05 Mar 2000) |
| retinacula of peroneal muscles | Superior and inferior fibrous bands retaining the tendons of the peroneus longus and brevis in position as they cross the lateral side of the ankle. Synonym: retinacula musculorum peroneorum, retinacula musculorum fibularium, retinacula of peroneal muscles. (05 Mar 2000) |
| retinacula unguis | Fibrous attachments of the nail-bed to the underlying phalanx. Synonym: retinacula unguis. (05 Mar 2000) |
| retinaculum | A hook-like structure to which another structure is tethered, in orchids and members of the family Asclepiadaceae, the structure to which pollen masses are attached, in Acanthaceae, the persistent stalk of an ovule. (09 Oct 1997) |
| retinaculum capsulae articularis coxae | One of several longitudinal folds of the articular capsule of the hip joint reflected onto the femoral neck deep to which the retinacular branches of the medial femoral circumflex artery pass to reach the femoral head. Synonym: retinaculum capsulae articularis coxae, Weitbrecht's fibres. (05 Mar 2000) |
| retinaculum caudale | Fibrous bands, remnants of the notochord, that extend from the skin to the coccyx, forming the coccygeal foveola. Synonym: retinaculum caudale, caudal ligament, ligamentum caudale. (05 Mar 2000) |
| retinaculum cutis | One of the numerous small fibrous strands that extend through the superficial fascia attaching the deep surface of the dermis to the underlying deep fascia determining the mobility of the skin over the deep structures; these are particularly well developed over the breast where they are known as suspensory ligaments of the breast; they are also well-developed, but short, in the palms and soles. Synonym: retinaculum of skin. (05 Mar 2000) |
| retinaculum extensorum | A strong fibrous band formed as a thickening of the antebrachial deep fascia, stretching obliquely across the back of the wrist, attaching deeply to ridges on the dorsal aspect of the radius, triquetral and pisiform bones, binding down the extensor tendons of the fingers and thumb. Synonym: retinaculum extensorum, dorsal carpal ligament, ligamentum carpi dorsale. (05 Mar 2000) |
| retinaculum flexorum | <anatomy> A strong fibrous band crossing the front of the carpus and binding down the flexor tendons of the digits and the flexor carpi radialis tendon and the median nerve; in so doing it creates the carpal tunnel. Synonym: retinaculum flexorum, deep part of flexor retinaculum, flexor retinaculum, ligamentum carpi transversum, ligamentum carpi volare, volar carpal ligament. (05 Mar 2000) |
| retinaculum musculorum extensorum inferius | A Y-shaped ligament restraining the extensor tendons of the foot distal to the ankle joint. Synonym: retinaculum musculorum extensorum inferius, cruciate ligament of leg, inferior retinaculum of extensor muscles, ligamentum cruciatum cruris. (05 Mar 2000) |