| VOR | vestibulo-ocular reflex; volume of regret |
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| VRR | ventral root reflex |
| VUR | vesicoureteral reflex |
virilescence (낭성화, 웅성화
| reflex symptom | A disturbance of sensation or function in an organ or part more or less remote from the morbid condition giving rise to it; e.g., muscle spasm due to joint inflammation. Synonym: sympathetic symptom. (05 Mar 2000) |
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| reflex tachycardia | Increased heart rate in response to some stimulus conveyed through the cardiac nerves. (05 Mar 2000) |
| reflex therapy | Treatment of some morbid condition by exciting a reflex action, as in the household treatment of nosebleed by a piece of ice applied to the cervical spine. Synonym: reflexotherapy. (05 Mar 2000) |
| reflex, vestibulo-ocular | A reflex wherein impulses are conveyed from the cupulas of the saemicircular canals and from the otolithic membrane of the saccule and utricle via the vestibular nuclei of the brainstem and the median longitudinal fasciculus to the oculomotor nerve nuclei. It functions to maintain a stable retinal image during head rotation by generating appropriate compensatory eye movements. (12 Dec 1998) |
| Mayer's reflex | Opposition and adduction of the thumb with flexion at its metacarpophalangeal joint and extension at its interphalangeal joint, when firm passive flexion of the third, fourth, or fifth finger is made; the reflex is present normally but is absent in pyramidal lesions. Synonym: finger-thumb reflex, Mayer's reflex. (05 Mar 2000) |
| patellar reflex | A sudden contraction of the anterior muscles of the thigh, caused by a smart tap on the patellar tendon while the leg hangs loosely at a right angle with the thigh. Synonym: knee jerk, knee phenomenon, knee reflex, knee-jerk reflex, patellar tendon reflex, quadriceps reflex. (05 Mar 2000) |
| patellar tendon reflex | A sudden contraction of the anterior muscles of the thigh, caused by a smart tap on the patellar tendon while the leg hangs loosely at a right angle with the thigh. Synonym: knee jerk, knee phenomenon, knee reflex, knee-jerk reflex, patellar tendon reflex, quadriceps reflex. (05 Mar 2000) |
| patello-adductor reflex | Crossed adduction of the leg on tapping the quadriceps tendon. (05 Mar 2000) |
| visceral traction reflex | Laryngeal spasm precipitated during an operation by traction on the stomach, gallbladder, or appendiceal mesentery. (05 Mar 2000) |
| 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) |
| 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) |