| PSI | posterior sagittal index; problem solving information; prostaglandin synthetic inhibitor; psychologi... |
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| PSIS | posterior sacroiliac spine |
| PSP | pancreatic spasmolytic peptide; paralytic shellfish poisoning; parathyroid secretory protein; period... |
| PT | pain threshold; parathormone; parathyroid; paroxysmal tachycardia; part time; patient; pericardial t... |
| PTF | patient treatment file; plasma thromboplastin factor; posterior talofibular [ligament]; proximal tub... |
| posterior palatine foramina | Openings on the hard palate of palatine canals passing vertically through the tuberosity of the palatine bone and transmitting the smaller palatine nerves and vessels. Synonym: foramina palatina minora, posterior palatine foramina. (05 Mar 2000) |
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| posterior palatine spine | The sharp posterior extremity of the nasal crest of the hard palate. Synonym: spina nasalis posterior, posterior palatine spine. (05 Mar 2000) |
| posterior pancreaticoduodenal artery | <anatomy, artery> Origin, one of several small branches from the gastroduodenal artery posterior to the duodenum; distribution, first part of duodenum. Synonym: arteria retroduodenalis, posterior pancreaticoduodenal artery. (05 Mar 2000) |
| posterior parietal artery | <anatomy, artery> The branch distributed to the posterior part of the parietal lobe. Synonym: arteria parietales posterior. (05 Mar 2000) |
| posterior parolfactory sulcus | A shallow groove on the medial surface of the hemisphere demarcating the subcallosal gyrus or precommissural septum from the parolfactory area. Synonym: sulcus parolfactorius posterior. (05 Mar 2000) |
| posterior parotid veins | Branches draining part of the parotid gland and emptying into the retromandibular vein. Synonym: venae parotidea, posterior parotid veins. (05 Mar 2000) |
| posterior part | The posterior portion of the anterior commissure of the brain. (05 Mar 2000) |
| posterior part of the diaphragmatic surface of the liver | That portion of the diaphragmatic surface of the liver that includes the bare area and the caudate lobe. Synonym: pars posterior faciei diaphragmatis hepatis. (05 Mar 2000) |
| posterior pelvic exenteration | Removal of the vagina, uterus, adnexa, rectum, anus, and adjacent lymph nodes; a colostomy is necessary. (05 Mar 2000) |
| posterior perforated substance | The bottom of the interpeduncular fossa at the base of the midbrain, extending from the anterior border of the pons forward to the mamillary bodies, and containing numerous openings for the passage of perforating branches of the posterior cerebral arteries. Synonym: substantia perforata posterior, locus perforatus posticus, Malacarne's space. (05 Mar 2000) |
| posterior pericallosal vein | It originates on the superior surface of the corpus callosum and runs posteriorly to terminate in the great cerebral vein. Synonym: dorsal callosal vein, dorsal vein of corpus callosum, posterior marginal vein, posterior pericallosal vein. (05 Mar 2000) |
| posterior periventricular nucleus | A nucleus located in the middle hypothalamus in the most ventral part of the third ventricle near the entrance of the infundibular recess. Its small cells are in close contact with the ependyma. (12 Dec 1998) |
| posterior peroneal arteries | Lateral malleolar branches of peroneal artery. Synonym: rami malleolares laterales, arteriae malleolares posteriores laterales, posterior peroneal arteries. (05 Mar 2000) |
| posterior pillar of fauces | One of a pair of ridges or folds of mucous membrane which passes downward from the posterior margin of the soft palate to the lateral wall of the pharynx. It encloses the palatopharyngeus muscle and forms the posterior margin of the tonsillar fossa. It also demarcates the isthmus of fauces from oropharynx. Synonym: arcus palatopharyngeus, pharyngopalatine arch, posterior palatine arch, posterior pillar of fauces. (05 Mar 2000) |
| posterior pillar of fornix | That part of the fornix that rises in a forward curve behind the thalamus to continue forward as the body for fornix ventral to the corpus callosum. Synonym: crus of fornix, posterior pillar of fornix. (05 Mar 2000) |