| AASP | acute atrophic spinal paralysis; American Association of Senior Physicians; ascending aorta synchron... |
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| ASA | acetylsalicylic acid; active systemic anaphylaxis; Adams-Stokes attack; American Society of Anesthes... |
| ASCI | acute spinal cord injury; American Society for Clinical Investigation |
| ASH | aldosterone-stimulating hormone; American Society of Hematology; alkylosing spinal hyperostosis; ant... |
| ASIA | American Spinal Injury Association |
| trunk | <botany> The main stem or body of a tree, considered apart from its roots and branches. (09 Oct 1997) |
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| trunk of atrioventricular bundle | The singular initial portion (stem) of the atrioventricular bundle which passes from the atrioventricular node into the right trigone of the fibrous skeleton of the heart and along the periphery of the membranous interventricular septum; upon reaching the muscular interventricular septum, the trunk terminates by dividing into the right and left crura of the atrioventricular bundle. Synonym: truncus fascicularis atrioventricularis. (05 Mar 2000) |
| trunk of corpus callosum | The main arched portion of the corpus callosum. Synonym: truncus corporis callosi. (05 Mar 2000) |
| jugular lymphatic trunk | Lymphatic vessel on each side, conveying the lymph from the head and neck; that on the right side empties into the right lymphatic duct, that on the left into the thoracic duct. Synonym: truncus jugularis, jugular duct. (05 Mar 2000) |
| linguofacial trunk | The common trunk by which the lingual and facial arteries frequently arise from the external carotid artery. Synonym: truncus linguofacialis. (05 Mar 2000) |
| lumbosacral trunk | A large nerve, formed by the union of the fifth lumbar and first sacral nerves, with a branch from the fourth lumbar nerve, which enters into the formation of the sacral plexus. Synonym: truncus lumbosacralis. (05 Mar 2000) |
| anterior auricular branches of superficial temporal artery | <anatomy, artery> Distribution, auricle, earlobe and external acoustic meatus. Synonym: rami auriculares anteriores arteriae temporalis superficialis. (05 Mar 2000) |
| anterior cutaneous branches of intercostal nerves | Medial mammary branches of anterior cutaneous branches of ventral primary rami of thoracic spinal nerves. See: medial mammary branches. (05 Mar 2000) |
| anterior intercostal branches of internal thoracic artery | One of the arteries supplying the anterior portions of the intercostal spaces of the thoracic wall. Anterior intercostal arteries 1-6 arise as branches of the internal thoracic artery; 7-11 arise as branches of the musculophrenic artery. Synonym: rami intercostales anteriores, rami intercostalis anteriores arteria thoracica interna. (05 Mar 2000) |
| anterior superior alveolar branches of infraorbital nerve | <anatomy, nerve> The branches of the superior alveolar nerve that supply the incisors, canines, premolars, and first molar by their contributions to the superior dental plexus. Synonym: rami alveolares superiores anteriores nervi infraorbitalis. (05 Mar 2000) |
| anteromedial central branches | Branches of the anterior communicating artery which supply part of the hypothalamus. Synonym: rami centrales anteromediales. (05 Mar 2000) |
| articular branches | Branches distributed to joints. Almost any vessel related to a joint will supply articular rami. Most joints receive articular branches from the intramuscular branches of the motor nerves innervating the muscles crossing the joint (see Hilton's law). at this printing, Nomina Anatomica, however, specifically recognises only the articular branches of the descending genicular artery, ramus articulares arteriae descendentis genicularis; supplying the knee joint. Synonym: rami articulares, joint branches. (05 Mar 2000) |
| atrial branches | The atrial branches, the branches of the right coronary artery and the circumflex branch of the left coronary artery distributed to the right and left atrium, respectively. Synonym: rami atriales. (05 Mar 2000) |
| branches of segmental bronchi | Branches of segmental bronchi to the bronchopulmonary segments of the lungs. Synonym: rami bronchiales segmentorum. (05 Mar 2000) |
| buccal branches of facial nerve | <anatomy, nerve> Motor branches of the facial nerve distributed to buccina or muscle and other muscles of facial expression below orbit and above chin. Synonym: rami buccales nervi facialis. (05 Mar 2000) |