| TVR | tonic vibratory reflex; total vascular resistance; tricuspid valve replacement |
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| UR | unconditioned reflex; upper respiratory; uridine; urinal; urology; utilization review |
| VOR | vestibulo-ocular reflex; volume of regret |
| VRR | ventral root reflex |
| VUR | vesicoureteral reflex |
Preyer's test (프라이어 시험
radioisotope vesicoureteral reflex test
| viscerogenic reflex | Any of a number of reflex's, such as headache, cough, disturbed pulse, etc., caused by disordered conditions of any of the viscera. (05 Mar 2000) |
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| visceromotor reflex | Contraction of the muscles of the thorax or abdomen in response to a stimulus from one of the viscera therein. (05 Mar 2000) |
| visceropannicular reflex | Contraction of the panniculus carnosus muscle in the cat and certain other animals, in response to a stimulus applied to an abdominal viscus; the centre for the reflex is in the spinal cord, the afferent pathway is the splanchnic nerves. (05 Mar 2000) |
| viscerosensory reflex | An area of pain or sensitivity to pressure in the external body wall due to disease of one of the viscera. See: Head's lines. (05 Mar 2000) |
| viscerotrophic reflex | A degenerative change in the skeletal soft tissues consequent upon a chronic inflammatory condition of any of the thoracic or abdominal viscera. (05 Mar 2000) |
| Remak's reflex | Plantar flexion of the first three toes and, sometimes, the foot with extension of the knee induced by stroking of the upper anterior surface of the thigh; it occurs when the conducting paths in the cord are interrupted. (05 Mar 2000) |
| Pavlov's reflex | Peripheral vasoconstriction and a rise in blood pressure in response to a fall in pressure in the great veins. Synonym: Pavlov's reflex. (05 Mar 2000) |
| visual orbicularis reflex | Contraction of the orbicularis oculi muscle caused by a sudden visual stimulus. See: wink reflex. (05 Mar 2000) |
| renal reflex | Anuria caused by injury to a remote part of the body or by disease or injury to one kidney or ureter. (05 Mar 2000) |
| pectoral reflex | Contraction of the pectoralis major muscle elicited by tapping the seventh rib between the anterior and the medial axillary lines while the arm is abducted; contraction of the deltoid and biceps may also occur. Synonym: costopectoral reflex. (05 Mar 2000) |
| mediopubic reflex | Contraction of the adductors of the thigh upon tapping the pubic bone near the symphysis. (05 Mar 2000) |
| gluteal reflex | Contraction of the gluteal muscles following irritation of the skin of the buttocks. (05 Mar 2000) |
| vomiting reflex | Vomiting (contraction of the abdominal muscles with relaxation of the cardiac sphincter of the stomach and of the muscles of the throat) elicited by a variety of stimuli, especially one applied to the region of the fauces. Synonym: pharyngeal reflex. (05 Mar 2000) |
| cephalopalpebral reflex | Contraction of the orbicularis muscle elicited by tapping the vertex of the skull. (05 Mar 2000) |
| Mendel-Bechterew reflex | Percussion of the dorsum of the foot causes flexion of the toes; present in a pyramidal lesion. Synonym: dorsum pedis reflex, Mendel-Bechterew reflex. (05 Mar 2000) |