| UR | unconditioned reflex; upper respiratory; uridine; urinal; urology; utilization review |
|---|---|
| VOR | vestibulo-ocular reflex; volume of regret |
| VRR | ventral root reflex |
| VUR | vesicoureteral reflex |
| 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) |
| convulsive reflex | An incoordinated reflex in which muscles, even those opposing one another as in strychnine poisoning, contract. (05 Mar 2000) |
| coordinated reflex | A reflex in which several muscles take part in the performance of a purposeful act. (05 Mar 2000) |
| corneal reflex | A contraction of the eyelids when the cornea is lightly touched with a camel-hair pencil. Synonym: lid reflex. Reflection of light from the surface of the cornea. (05 Mar 2000) |
| costal arch reflex | Contraction of the rectus abdominis muscle by tapping the costal margin inside the mammary line. (05 Mar 2000) |
| myenteric reflex | Contraction above and relaxation below a stimulated point in the intestine. Synonym: law of intestine. (05 Mar 2000) |
| costopectoral 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) |
| cough reflex | <chest medicine, neurology, physiology> The reflex which mediates coughing in response to irritation of the larynx or tracheobronchial tree. Synonym: laryngeal reflex. (05 Mar 2000) |
| myotatic 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) |
| craniocardiac reflex | Stimulation of nerve endings of certain cranial nerves (e.g., olfactory, ophthalmic branch of trigeminal), with resultant cardiac depressor reflex, manifested by bradycardia and hypotension, through the cardiac branch of the vagus. (05 Mar 2000) |
| cremasteric reflex | A drawing up of the scrotum and testicle of the same side when the skin over Scarpa's triangle or on the inner side of the thigh is scratched. (05 Mar 2000) |
| crossed adductor reflex | Contraction of the adductors of the thigh and inward rotation of the limb elicited by tapping the sole. Synonym: crossed adductor jerk. (05 Mar 2000) |
| crossed extension reflex | Extension of the contralateral hind limb when the paw of an animal is painfully stimulated or the central cut end of an afferent nerve, e.g., the peroneal, is stimulated; sometimes occurs in humans upon tapping the skin. (05 Mar 2000) |
| crossed knee reflex | Contraction of the contralateral quadriceps when a patellar reflex is elicited. Synonym: crossed knee jerk. (05 Mar 2000) |