| pulmonocoronary reflex | Reflex constriction of the coronary arteries as a result of vagal stimuli arising in the lungs, as in pulmonary embolism. (05 Mar 2000) |
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| semimembranosus reflex | Contraction of these muscles by tapping in the region of the tuberosity of the tibia. (05 Mar 2000) |
| pupillary reflex | Change in diameter of the pupil as a reflex response to any type of stimulus; e.g., constriction caused by light. Synonym: light reflex. (05 Mar 2000) |
| pupillary-skin reflex | Dilation of the pupil following scratching of the skin of the neck. Synonym: ciliospinal reflex, cutaneous pupil reflex, cutaneous-pupillary reflex, skin-pupillary reflex. (05 Mar 2000) |
| H reflex | <clinical sign, neurology> A monosynaptic reflex consistently obtained in normal adults only by stimulating the tibial nerve, generally in the popliteal fossa, while recording from the gastrocnemius-soleus muscle group. It is similar to the Achilles reflex, except the neuromuscular spindles are bypassed; widely used in the EMG laboratory to diagnose S1 radiculopathies and polyneuropathies. (05 Mar 2000) |
| shot-silk reflex | The appearance of numerous wavelike, glistening reflexes, like the shimmer of silk, observed sometimes in the retina of a young person. Synonym: shot-silk phenomenon, shot-silk reflex. (05 Mar 2000) |
| sinus reflex | See: carotid sinus syndrome. (05 Mar 2000) |
| hypochondrial reflex | <neurology> A quick inspiration induced by sharp pressure beneath the costal margin. (05 Mar 2000) |
| hypogastric reflex | Contraction of the abdominal muscles upon stroking the inner aspect of the thigh; in association with the cremasteric reflex. Synonym: hypogastric reflex. (05 Mar 2000) |
| skin-pupillary reflex | Dilation of the pupil following scratching of the skin of the neck. Synonym: ciliospinal reflex, cutaneous pupil reflex, cutaneous-pupillary reflex, skin-pupillary reflex. (05 Mar 2000) |
| snapping reflex | <clinical sign> In latent tetany mild mechanical stimulation of the trigeminal nerve causes severe pain, flexion of the terminal phalanx of the thumb and of the second and third phalanges of one or more of the fingers when the volar surface of the terminal phalanx of the fingers is flicked. Synonym: digital reflex, Hoffmann's reflex, snapping reflex. (05 Mar 2000) |
| snout reflex | Pouting or pursing of the lips induced by light tapping of closed lips near the midline; seen in defective pyramidal innervation of facial musculature. (05 Mar 2000) |
| sole 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) |
| sole tap reflex | Plantar flexion of the foot and toes elicited by tapping the sole near its outer edge; has the same significance as the Rossolimo toe flexion reflex Also called Guillain-Barre, Weingrow's, or sole tap reflex. Synonym: Guillain-Barre reflex, sole tap reflex, Weingrow's reflex. (05 Mar 2000) |
| spinal reflex | A reflex arc involving the spinal cord. See: reflex arc. (05 Mar 2000) |