| capsula interna | <anatomy, neurology> A massive layer (8 to 10 mm thick) of white matter separating the caudate nucleus and thalamus (medial) from the more laterally situated lentiform nucleus (globus pallidus and putamen). It consists of 1) fibres ascending from the thalamus to the cerebral cortex that compose, among others, the visual, auditory, and somatic sensory radiations, and 2) fibres descending from the cerebral cortex to the thalamus, subthalamic region, midbrain, hindbrain, and spinal cord. The internal capsule is the major route by which the cerebral cortex is connected with the brainstem and spinal cord. Laterally and superiorly it is continuous with the corona radiata which forms a major part of the cerebral hemisphere's white matter; caudally and medially it continues, much reduced in size, as the crus cerebri which contains, among others, the pyramidal tract. On horizontal section it appears in the form of a V opening out laterally; the V's obtuse angle is called genu (knee). Its anterior and posterior limbs, respectively, the crus anterior and crus posterior. Synonym: capsula interna. (05 Mar 2000) |
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| capsula lentis | The capsule enclosing the lens of the eye. Synonym: capsula lentis, crystalline capsule, lenticular capsule, phacocyst. (05 Mar 2000) |
| capsula lienis | The fibrous capsule of the spleen, containing collagen, elastic fibres, and smooth muscle. Synonym: tunica fibrosa splenis, tunica fibrosa lienis, capsula lienis, tunica propria lienis. (05 Mar 2000) |
| capsula vasculosa lentis | In the embryo, the vascular mesenchymal capsule that invests the lens of the eye; the vessels of the dorsal part of the capsule are branches of the hyaloid artery; those of the ventral part are derived from the anterior ciliary arteries; normally all the vessels are atrophied by the end of the eighth month of intrauterine life. (05 Mar 2000) |
| arteria articularis azygos | <anatomy, artery> Origin, popliteal; distribution, synovial membrane and cruciate ligaments of knee joint. Synonym: arteria genus media, arteria articularis azygos. (05 Mar 2000) |
| articularis cubiti muscle | <anatomy> The name applied to a small slip of the medial head of the triceps that inserts into the capsule of the elbow joint. Synonym: musculus articularis cubiti, articular muscle of elbow, subanconeus muscle. (05 Mar 2000) |
| articularis genu | <anatomy, muscle> Origin, lower fourth of anterior surface of shaft of femur; insertion, suprapatellar bursa of knee joint; action, retracts suprapatellar bursa, during extension of knee; nerve supply, femoral. Synonym: musculus articularis genus, articular muscle of knee, Dupre's muscle, subcrural muscle, subcruralis, subcrureus, subquadricipital muscle. (05 Mar 2000) |
| cartilago articularis | The cartilage covering the articular surfaces of the bones participating in a synovial joint. Synonym: cartilago articularis, arthrodial cartilage, diarthrodial cartilage, investing cartilage. (05 Mar 2000) |
| cavitas articularis | A joint cavity, the potential space bounded by the synovial membrane and articular cartilages of all synovial joints. Normally, the articular cavity contains only sufficient synovial fluid to lubricate the internal surfaces. Synonym: cavitas articularis, cavum articulare. (05 Mar 2000) |
| 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) |
| meniscus articularis | A crescent-shaped intra-articular fibrocartilage found in certain joints. Synonym: meniscus articularis, articular crescent, intra-articular cartilage. (05 Mar 2000) |
| circulus articularis vasculosus | articular vascular circle, articular vascular network |
| circumferentia articularis radii | The portion of the head of the radius that articulates with the radial notch of the ulna. Synonym: circumferentia articularis radii. (05 Mar 2000) |
| circumferentia articularis ulnae | The portion of the head of the ulna that articulates with the ulnar notch of the radius. Synonym: circumferentia articularis ulnae. (05 Mar 2000) |
| musculus articularis | <anatomy> A muscle that inserts directly onto the capsule of a joint, acting to retract the capsule in certain movements. Synonym: musculus articularis. (05 Mar 2000) |