| AERPAP | antegrade effective refractory period accessory pathway |
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| AOB | accessory olfactory bulb; alcohol on breath |
| AOT | accessory optic tract; Anderson Olsson table; anodal opening tetanus; Association of Occupational Th... |
| AP | accessory pathway; accounts payable; acid phosphatase; acinar parenchyma; action potential; active p... |
| CFVS | cerebrospinal fluid flow void sign |
| accessory gland | A small mass of glandular structure, detached from but lying near another and larger gland, to which it is similar in structure and probably in function. (05 Mar 2000) |
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| accessory hemiazygos vein | <anatomy, vein> Formed by the union of the fourth to seventh left posterior intercostal veins, passes along the side of the bodies of the fifth, sixth, and seventh thoracic vertebrae, then crosses the midline behind the aorta, oesophagus, and thoracic duct, and empties into the azygos vein, sometimes in common with the hemiazygos vein. Synonym: vena hemiazygos accessoria, vena azygos minor superior. (05 Mar 2000) |
| accessory lacrimal glands | Small, compound, branched, tubular glands located in the middle part of the lid (Wolfring's glands, 1872, or Ciaccio's glands, 1874) and along the superior and inferior fornices of the conjunctival sac (Krause's glands, 1854). These accessory glands are just scattered scraps of lacrimal gland tissue; all of them produce the same kind of tears and debouch on to the conjunctival surface. Henle's and Baumgarten's "glands" are in fact not glands at all, but mere epithelial invaginations. Synonym: glandulae lacrimales accessoriae. (05 Mar 2000) |
| accessory ligaments | Ligament's about a joint that are in addition to the articular capsule. They may lie within, or on the outside of the latter. (05 Mar 2000) |
| accessory meningeal branch of middle meningeal artery | <anatomy, artery> A branch of either the middle meningeal or maxillary artery in the infratemporal fossa and passing superiorly through the foramen ovale to supply the trigeminal ganglion, dura mater and inner table of bone. Synonym: ramus meningeus accessorius arteriae meningeae mediae. (05 Mar 2000) |
| accessory molecules | Cell surface adhesion molecules on T-cells that are involved in binding of one cell to another cell or in signal transduction, e.g., CD4. (05 Mar 2000) |
| accessory nasal cartilages | Variable small plates of cartilage located in the interval between the greater alar and lateral nasal cartilages. Synonym: cartilagines nasales accessoriae, sesamoid cartilages of nose. (05 Mar 2000) |
| accessory nerve | <anatomy, nerve> The accessory nerve enervates the sternocleidomastoid muscles and the trapezius muscles. Lesions of the eleventh result in drooping of the shoulder and inability to rotate the head away from the affected side. Synonym: cranial nerve XI. (27 Sep 1997) |
| accessory nerve lymph nodes | The nodes of the lateral deep cervical group that are located along the accessory nerve; their efferent vessels pass to the supraclavicular lymph nodes. Synonym: companion lymph nodes of accessory nerve, nodi lymphatici comitantes nervi accessorii. (05 Mar 2000) |
| accessory nerve trunk | Part of the accessory nerve formed within the cranial cavity by the union of the cranial and spinal roots, which then divides within the jugular foramen into internal and external branches, the former uniting with the vagus, the latter exiting the foramen as in independent branch which is commonly considered to be the accessory nerve. (05 Mar 2000) |
| accessory obturator artery | <anatomy, artery> Term applied to the anastomosis of pubic branch of the inferior epigastric artery with the pubic branch of the obturator artery when it contributes a significant supply through the obturator canal. Synonym: arteria obturatoria accessoria, ramus obturatorius arteriae epigastricae inferioris. (05 Mar 2000) |
| accessory olivary nuclei | See: dorsal accessory olivary nucleus, medial accessory olivary nucleus. (05 Mar 2000) |
| accessory organs | Organ's exceeding the normal number, which may develop from multiple foci of organization in an organ-formative field larger (originally) than that of the definitive main organ; such organ's are aberrant but frequently not a cause of disease; illness may persist if they are left in the body after therapeutic removal of the main organ, e.g., accessory spleen. Synonym: accessory organs. (05 Mar 2000) |
| accessory organs of the eye | The eyelids, with lashes and eyebrows, lacrimal apparatus, conjunctival sac, and extrinsic muscles of the eyeball. Synonym: organa oculi accessoria, accessory organs, accessory visual apparatus, adnexa oculi, appendages of eye. (05 Mar 2000) |
| accessory pancreas | A detached portion of pancreatic tissue, usually the uncinate process, and hence most often found in the vicinity of the head of the pancreas, but may occur within the gut wall (stomach or duodenum). Synonym: pancreas accessorium. Annular pancreas, a ring of pancreas encircling the duodenum, caused by a failure of the embryologic ventral pancreas to migrate to the right of the duodenum. (05 Mar 2000) |