| 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 |
virilescence (낭성화, 웅성화
| Westphal's pupillary reflex | A constriction of both pupils when an effort is made to close eyelids forcibly held apart. A variant of the pupil response to near vision. Synonym: Galassi's pupillary phenomenon, Gifford's reflex, lid-closure reaction, orbicularis phenomenon, orbicularis pupillary reflex, Piltz sign, Westphal's pupillary reflex, Westphal-Piltz phenomenon. (05 Mar 2000) |
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| Moro reflex | The reflex response of an infant (contraction of the limb and neck muscles) when allowed to drop a short distance through the air or startled by a sudden noise or jolt. Synonym: Moro reflex, parachute reflex, startle reaction. Synonym: cochleopalpebral reflex. (05 Mar 2000) |
| white pupillary reflex | Reflection from a white mass within the eye giving the appearance of a white pupil. Synonym: leukokoria, white pupillary reflex. Origin: Leuko-white, + G. Kore, pupil (05 Mar 2000) |
| plantar muscle reflex | Flicking the tops of the toes from the plantar surface causes flexion of the toes; a stretch reflex of the flexors of the toes seen in lesions of the pyramidal tracts. See: Starling's reflex. Synonym: plantar muscle reflex, Rossolimo's sign. (05 Mar 2000) |
| plantar reflex | The response to tactile stimulation of the ball of the foot, normally plantar flexion of the toes; the pathologic response is Babinski's sign. Synonym: sole reflex. (05 Mar 2000) |
| wink reflex | General term for reflex closure of eyelids caused by any stimulus. Synonym: eye-closure reflex. (05 Mar 2000) |
| withdrawal reflex | Flexion of ankle, knee, and hip when the foot is painfully stimulated; the crossed extension reflex occurs in association with it. Synonym: defense reflex, nociceptive reflex, withdrawal reflex. (05 Mar 2000) |
| conditioned reflex | A reflex that is gradually developed by training and association through the frequent repetition of a definite stimulus. See: conditioning. Synonym: acquired reflex, behaviour reflex, trained reflex. (05 Mar 2000) |
| conjunctival reflex | Closure of the eyes in response to irritation of the conjunctiva. (05 Mar 2000) |
| wrist clonus reflex | Sudden extension of the wrist induces a sustained clonic movement. (05 Mar 2000) |
| consensual light reflex | Contraction of the pupil of the fellow eye in consensus with the pupil of the illuminated eye. Synonym: consensual light reflex, indirect pupillary reaction. (05 Mar 2000) |
| pneocardiac reflex | A modification in the blood pressure or heart rhythm caused by the inhalation of an irritating vapor. (05 Mar 2000) |
| pneopneic reflex | A modification of the respiratory rhythm caused by the inhalation of an irritating vapor. (05 Mar 2000) |
| muscular reflex | Tonic contraction of the muscles in response to a stretching force, due to stimulation of muscle proprioceptors. Synonym: Liddell-Sherrington reflex, muscular reflex, stretch reflex. (05 Mar 2000) |
| contralateral reflex | <clinical sign> A physical examination finding that can indicate inflammation of the meninges (meningitis), performed in two forms: passive flexion of one leg results in a similar movement on the opposite side or if the neck is passively flexed, flexion occurs in the legs. (27 Sep 1997) |