| IA | ibotenic acid; immune adherence; immunoadsorbent; immunobiologic activity; impedance angle; indolami... |
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| IC | icteric, icterus; immune complex; immunoconjugate; immunocytochemistry; immunocytotoxicity; impedanc... |
| IEA | immediate early antigen; immunoelectroadsorption; immunoelectrophoretic analysis; infectious equine ... |
| IFG | inferior frontal gyrus; interferon gamma |
| IMA | Industrial Medical Association; inferior mesenteric artery; Interchurch Medical Assistance; internal... |
| greater posterior rectus muscle of head | <anatomy, muscle> Origin, spinous process of axis; insertion, middle of inferior nuchal line of occipital bone; action, rotates and draws head backward; nerve supply, dorsal branch of first cervical (suboccipital). See: suboccipital muscles. Synonym: musculus rectus capitis posterior major, greater posterior rectus muscle of head, musculus rectus capitis posticus major. (05 Mar 2000) |
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| gyrus rectus | A gyrus running along the medial part of the orbital surface of the frontal lobe of the cerebral hemisphere. It is bounded laterally by the olfactory sulcus. Synonym: gyrus rectus. (05 Mar 2000) |
| posterior layer of rectus abdominis sheath | The portion of the sheath of the rectus abdominis muscle that lies posterior to the muscle covering only its upper two-thirds; it is formed by contributions from the aponeuroses of the internal oblique and transversus abdominis muscles; its free inferior margin forms the arcuate line; it is deficient below this, the posterior aspect of the muscle being covered only by transversalis fascia and peritoneum. Synonym: lamina posterior vaginae musculi recti abdominis. (05 Mar 2000) |
| sinus rectus | straight sinus |
| smaller posterior rectus muscle of head | <anatomy, muscle> Origin, from posterior tubercle of atlas; insertion, medial third of inferior nuchal line of occipital bone; action, rotates head and draws it backward; nerve supply, dorsal branch of first cervical (suboccipital). See: suboccipital muscles. Synonym: musculus rectus capitis posterior minor, musculus rectus capitis posticus minor, smaller posterior rectus muscle of head. (05 Mar 2000) |
| superior rectus | <anatomy, muscle> Origin, superior part of common tendinous ring; insertion, superior part of sclera of the eye; action, primary, elevation; secondary, adduction and intorsion; nerve supply, oculomotor. Synonym: musculus rectus superior, attollens oculi. (05 Mar 2000) |
| tubulus rectus | The continuation of the tubulus seminifer contortus which becomes straight just before entering the mediastinum to form the rete testis. Synonym: tubulus renalis rectus, tubulus seminifer rectus, collecting tubule, straight tubule, tubulus rectus, tubulus rectus, vasa recta. (05 Mar 2000) |
| tubulus renalis rectus | The continuation of the tubulus seminifer contortus which becomes straight just before entering the mediastinum to form the rete testis. Synonym: tubulus renalis rectus, tubulus seminifer rectus, collecting tubule, straight tubule, tubulus rectus, tubulus rectus, vasa recta. (05 Mar 2000) |
| tubulus seminifer rectus | The continuation of the tubulus seminifer contortus which becomes straight just before entering the mediastinum to form the rete testis. Synonym: tubulus renalis rectus, tubulus seminifer rectus, collecting tubule, straight tubule, tubulus rectus, tubulus rectus, vasa recta. (05 Mar 2000) |
| lacertus of lateral rectus muscle | <anatomy> The part of the tendon of origin of the lateral rectus muscle attaching to the greater wing of the sphenoid bone, lateral to the common tendinous ring; often incorrectly equated to the lateral check ligament of the eyeball. Synonym: lacertus musculi recti lateralis. (05 Mar 2000) |
| lateral rectus | <anatomy, muscle> Origin, lateral part of the common tendinous ring that bridges superior orbital fissure; insertion, lateral part of sclera of eye; action, abduction; nerve supply, abducens. Synonym: musculus rectus lateralis, abducens oculi, musculus rectus externus. (05 Mar 2000) |
| lateral rectus muscle of the head | <anatomy, muscle> Origin, transverse process of atlas; insertion, jugular process of occipital bone; action, inclines head to one side; nerve supply, ventral primary ramus of first cervical spinal nerve. Synonym: musculus rectus capitis lateralis, lateral rectus muscle of the head. (05 Mar 2000) |
| aditus glottidis inferior | The part of the cavity of the larynx immediately below the glottis. Synonym: cavitas infraglotticum, aditus glottidis inferior, cavum infraglotticum, inferior laryngeal cavity, infraglottic space. (05 Mar 2000) |
| angulus inferior scapulae | The acute angle formed by junction of the medial and lateral borders of the scapula. Synonym: angulus inferior scapulae. (05 Mar 2000) |
| anterior inferior cerebellar artery | <anatomy, artery> Origin, basilar; distribution, lower surface of lateral lobes of cerebellum, choroid plexus in cerebellopontine angle; anastomoses, posterior inferior cerebellar; usual source of labyrinthine artery. Synonym: arteria cerebelli inferior anterior. (05 Mar 2000) |