| nervus vascularis | <anatomy, nerve> A small nerve filament that supplies the wall of a blood vessel. Synonym: nervus vascularis. (05 Mar 2000) |
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| nervus vertebralis | <anatomy, nerve> A branch from the stellate ganglion that ascends along the vertebral artery to the level of the axis or atlas, giving branches to the cervical nerves and meninges. Synonym: nervus vertebralis. (05 Mar 2000) |
| nervus vestibularis | <anatomy, nerve> The vestibular part of the acoustic (8th cranial) nerve. The vestibular nerve fibres arise from neurons of scarpa's ganglion and project peripherally to vestibular hair cells and centrally to the vestibular nuclei of the brainstem. These fibres mediate the sense of balance and head position. (12 Dec 1998) |
| nervus vestibulocochlearis | vestibulocochlear nerve. See entries under radix |
| nervus zygomaticus | <anatomy, nerve> A branch of the maxillary nerve in the inferior orbital fissure through which it passes; it gives rise to two sensory branches, the zygomaticotemporal and zygomaticofacial, which supply the skin of the temporal and zygomatic regions and is continued as the communicating branch of the lacrimal nerve with the zygomatic nerve. Synonym: nervus zygomaticus, orbital nerve, temporomandibular nerve. (05 Mar 2000) |
| valve of inferior vena cava | An endocardial fold extending from the anterior inferior margin of the inferior vena cava to the anterior part of the limbus fossa ovalis. Synonym: valvula venae cavae inferioris, caval valve, eustachian valve, sylvian valve. (05 Mar 2000) |
| vena | <anatomy> Any one of the great systemic veins connected directly with the heart. Vena contracta. The portal vein of the liver. A vein. Vena cava. Origin: L, literally, contracted vein, hollow vein. (11 Mar 1998) |
| vena advehens | Collective term for a series of branching channels in the early embryo receiving blood from the umbilical and/or vitelline venous systems and passing the mixed blood to the sinusoids of the liver; they become terminal branches of the hepatic portal vein. Synonym: vena afferentes hepatis. (05 Mar 2000) |
| vena afferentes hepatis | Collective term for a series of branching channels in the early embryo receiving blood from the umbilical and/or vitelline venous systems and passing the mixed blood to the sinusoids of the liver; they become terminal branches of the hepatic portal vein. Synonym: vena afferentes hepatis. (05 Mar 2000) |
| vena anastomotica inferior | <anatomy, vein> An inconstant vein that passes from the superficial middle cerebral vein posteriorly over the lateral aspect of the temporal lobe to enter the transverse sinus. Synonym: vena anastomotica inferior, Browning's vein, Labbe's vein. (05 Mar 2000) |
| vena anastomotica superior | <anatomy, vein> A large communicating vein between the superficial middle cerebral vein and the superior sagittal sinus; it passes upward from the lateral sulcus, often following the line of the central sulcus (Rolando's fissure). Synonym: vena anastomotica superior, Trolard's vein. (05 Mar 2000) |
| vena angularis | <anatomy, vein> A short vein at the medial angle of the eye, formed by the supraorbital and supratrochlear veins's and continuing as the facial vein. Synonym: vena angularis. (05 Mar 2000) |
| vena appendicularis | <anatomy, vein> The tributary of the ileocolic vein that accompanies the appendicular artery. Synonym: vena appendicularis. (05 Mar 2000) |
| vena aqueductus cochleae | It drains the cochlea, sacculus, and part of the utricules, and empties into the superior bulb of the jugular vein by accompanying the perilymphatic duct through the cochlear canaliculus. Synonym: vena aqueductus cochleae, vein of cochlear aqueduct, vena canaliculi cochleae. (05 Mar 2000) |
| vena aqueductus vestibuli | A small vein accompanying the endolymphatic duct; it drains much of the vestibular portion of the labyrinth and terminates in the inferior petrosal sinus. Synonym: vena aqueductus vestibuli. (05 Mar 2000) |