| velonoskiascopy | An obsolete subjective test for ametropia in which a thin rod is moved across the pupil while a distant light source is fixed; the shadow of the rod moves with the rod in myopia, and in the opposite direction in hyperopia. Origin: G. Velone (belone), needle, + skiascopy (05 Mar 2000) |
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| velopharyngeal | Pertaining to the soft palate (velum palatinum) and the posterior nasopharyngeal wall. (05 Mar 2000) |
| velopharyngeal closure | The apposition of the palate to the upper posterior pharyngeal wall as in deglutition and in some speech sounds. (05 Mar 2000) |
| velopharyngeal insufficiency | Failure of the soft palate to reach the posterior pharyngeal wall. It may be caused by cleft palate surgery, palatal or pharyngeal abnormalities or injury, or neuromuscular dysfunction of the velopharyngeal sphincter. It causes hypernasality of speech. (12 Dec 1998) |
| velopharyngeal seal | Closure between the oral and nasopharyngeal cavities. (05 Mar 2000) |
| velopharyngeal sphincter | A constant band of the superior pharyngeal constrictor muscle which sweeps posteriorly from the anterolateral part of the superior surface of the palatine aponeurosis. It creates a visible ridge when the superior constrictor is contracted, meeting the elevated soft palate to seal off the pharyngeal isthmus during swallowing. Synonym: pharyngeal ridge, sphincter of the pharyngeal isthmus, velopharyngeal sphincter. (05 Mar 2000) |
| velosynthesis | Suture of a cleft palate. Synonym: staphylorrhaphy, uraniscorrhaphy, uranorrhaphy, velosynthesis. Origin: palato-+ G. Rhaphe, suture (05 Mar 2000) |
| Velpeau's bandage | A bandage which serves to immobilise arm to chest wall, with the forearm positioned obliquely across and upward on front of chest. (05 Mar 2000) |
| Velpeau's canal | A passage in the lower anterior abdominal wall which in the male allows passage of the spermatic cord and in the female contains the round ligament. Because of the weakness it creates in the abdominal wall, it is the most frequent site for a hernia. (12 Dec 1998) |
| Velpeau's fossa | A wedge-shaped space with its base toward the perineum and lying between the tuberosity of the ischium and the obturator internus muscle laterally and the external anal sphincter and the levator ani muscle medially. Synonym: fossa ischiorectalis, ischioanal fossa, Velpeau's fossa. (05 Mar 2000) |
| Velpeau's hernia | Femoral hernia in which the intestine is in front of the blood vessels. (05 Mar 2000) |
| Velpeau, Alfred | <person> French surgeon, 1795-1867. See: Velpeau's bandage, Velpeau's canal, Velpeau's fossa, Velpeau's hernia. (05 Mar 2000) |
| velum | A membranous covering, a veil. (09 Oct 1997) |
| velum interpositum | A double fold of pia mater, enclosing subarachnoid trabeculae, between the fornix above and the epithelial roof of the third ventricle and the thalami below; at each lateral margin is a vascular fringe projecting into the choroidal fissure of the lateral ventricle; on its undersurface are several small vascular projections filling the folds of the ependymal roof of the third ventricle. Synonym: tela choroidea ventriculi tertii, tela choroidea superior, triangular lamella, velum interpositum, velum triangulare. (05 Mar 2000) |
| velum medullare inferius | A thin sheet of white matter, hidden by the cerebellar tonsil, attached along the peduncle of the flocculus and, at and near the midline, to the nodulus of the vermis; it is continuous caudally with the epithelial lamina and choroid plexus of the fourth ventricle. Synonym: velum medullare inferius, posterior medullary velum, Tarin's valve, valvula semilunaris tarini, velum semilunare, velum tarini. (05 Mar 2000) |