| TVR | tonic vibratory reflex; total vascular resistance; tricuspid valve replacement |
|---|---|
| UR | unconditioned reflex; upper respiratory; uridine; urinal; urology; utilization review |
| VOR | vestibulo-ocular reflex; volume of regret |
| VRR | ventral root reflex |
| VUR | vesicoureteral reflex |
| Starling's reflex | Tapping the volar surfaces of the fingers causes flexion of the fingers; analogous to Rossolimo's reflex, for the toes. (05 Mar 2000) |
|---|---|
| startle 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) |
| statokinetic reflex | A reflex which, through stimulation of the receptors in the neck muscles and saemicircular canals, brings about movements of the limbs and eyes appropriate to a given movement of the head in space. (05 Mar 2000) |
| stepping reflex | If the plantar surface of a hind foot of a dog is pressed gently, a movement of extension of the limb will follow, accompanied sometimes by flexion of the opposite hind limb. (05 Mar 2000) |
| sternobrachial reflex | Contraction of the adductors of the arm when the sternum is tapped. (05 Mar 2000) |
| stretch 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) |
| Strumpell's reflex | Stroking the abdomen or thigh causes flexion of the leg and adduction of the foot. (05 Mar 2000) |
| styloradial reflex | With the arm supinated to 45 |
| nociceptive 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) |
| nocifensor reflex | Vascular dilation in a part surrounding an injury or in its neighborhood. (05 Mar 2000) |
| suckling reflex | The reflex liberation of prolactin from the anterior lobe of the hypophysis evoked by stimulation of nerves in the nipple during the act of suckling by the newborn animal. (05 Mar 2000) |
| nose-bridge-lid reflex | Contraction of the orbicularis oculi muscles upon tapping the margin of the orbit, or the bridge or tip of the nose. Synonym: nose-bridge-lid reflex, nose-eye reflex. (05 Mar 2000) |
| nose-eye reflex | Contraction of the orbicularis oculi muscles upon tapping the margin of the orbit, or the bridge or tip of the nose. Synonym: nose-bridge-lid reflex, nose-eye reflex. (05 Mar 2000) |
| darwinian reflex | The tendency of young infants to grasp a bar and hang suspended. Compare: grasping reflex. (05 Mar 2000) |
| superficial reflex | Any reflex, e.g., the abdominal or cremasteric reflex, which is elicited by stimulation of the skin. (05 Mar 2000) |