| PN | papillary necrosis; parenteral nutrition; penicillin; perceived noise; percussion note; periarteriti... |
|---|---|
| PNS | paraneoplastic syndrome; parasympathetic nervous system; partial nonprogressive stroke; peripheral n... |
| PNZ | posterior necrotic zone |
| PO | by mouth, orally [Lat. per os]; parieto-occipital; parietal operculum; period of onset; perioperativ... |
| post | posterior |
| plexus venosus suboccipitalis | The extensive plexus of veins in the suboccipital region. Synonym: plexus venosus suboccipitalis. (05 Mar 2000) |
|---|---|
| plexus venosus uterinus | The plexiform veins that lie along the sides of the uterus in the broad ligament. Synonym: plexus venosus uterinus. (05 Mar 2000) |
| plexus venosus vaginalis | The plexus of veins that surrounds the vagina. Synonym: plexus venosus vaginalis. (05 Mar 2000) |
| plexus venosus vertebralis | Any of four interconnected venous networks surrounding the vertebral column; anterior external vertebral venous plexus, the small system around the vertebral bodies; posterior external vertebral venous plexus, the extensive system around the vertebral processes; anterior internal vertebral venous plexus, the system running the length of the vertebral canal anterior to the dura; posterior internal vertebral venous plexus, the system running the length of the vertebral canal posterior to the dura; the latter two constitute the epidural venous plexus. Synonym: plexus venosus vertebralis, Batson's plexus, vertebral venous plexus. (05 Mar 2000) |
| plexus venosus vesicalis | A plexus of veins around the fundus and sides of the bladder. Synonym: plexus venosus vesicalis, venous plexus of bladder. (05 Mar 2000) |
| plexus vertebralis | <anatomy, artery> A plexus of autonomic nerves on the vertebral artery derives from the subclavian plexus. Synonym: plexus vertebralis, vertebral plexus. (05 Mar 2000) |
| plexus vesicalis | An autonomic plexus on the bladder, derived from the inferior hypogastric plexus. Synonym: plexus vesicalis. (05 Mar 2000) |
| plexus vesicalis inferior | A venous plexus in the female corresponding to the prostatic venous plexus in the male. Synonym: plexus vesicalis inferior. (05 Mar 2000) |
| coronary plexus | The continuation of the cardiac plexus onto the coronary arteries. Synonym: plexus coronarius cordis. (05 Mar 2000) |
| myenteric plexus | One of two ganglionated neural networks which together form the enteric nervous system. The myenteric (auerbach's) plexus is located between the longitudinal and circular muscle layers of the gut. Its neurons project to the circular muscle, to other myenteric ganglia, to submucosal ganglia, or directly to the epithelium, and play an important role in regulating and patterning gut motility. (12 Dec 1998) |
| popliteal plexus | Plexus popliteus, a nerve plexus surrounding the popliteal artery, derived from the femoral plexus. (05 Mar 2000) |
| Cruveilhier's plexus | A nerve plexus formed by communications between the dorsal primary rami of the first three cervical nerves; it lies deep to the semispinalis capitis muscle. (05 Mar 2000) |
| haemorrhoidal plexus | A venous plexus resting upon the posterior and lateral walls of the rectum; it drains into the superior rectal vein to the portal, the middle rectal to the internal iliac and the inferior rectal to the internal pudendal. Synonym: plexus venosus rectalis, haemorrhoidal plexus. (05 Mar 2000) |
| Haller's plexus | A nervous plexus of sympathetic filaments and branches of the external laryngeal nerve on the surface of the inferior constrictor muscle of the pharynx. (05 Mar 2000) |
| sacral plexus | Formed by the fourth and fifth lumbar (lumbosacral trunk) and first, second, and third sacral nerves; it lies on the inner surface of the posterior wall of the pelvis usually embedded in the piriformis muscle; its nerves supply the lower limbs, its major product being the sciatic nerve. Synonym: plexus sacralis, ischiadic plexus, sciatic plexus. (05 Mar 2000) |