| protective laryngeal reflex | Closure of the glottis to prevent entry of foreign substances into the respiratory tract. (05 Mar 2000) |
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| Schaffer's reflex | In cases of injury to the corticospinal tract, the great toe is dorsiflexed when the skin over the Achilles tendon is pinched. (05 Mar 2000) |
| scratch reflex | In dogs, stimulus applied to the skin of a saddle-shaped area of the back, sides, and flanks produces a scratching movement of the hind leg of the side stimulated. (05 Mar 2000) |
| psychocardiac reflex | A change in the circulatory rate and subjective heart consciousness (often "thumping") resulting from a memory of, or a subconscious dream state recollection of, an emotional impression or experience. (05 Mar 2000) |
| psychogalvanic reflex | A change in electrical resistance of the skin, occurring in emotion and in certain other conditions. (12 Dec 1998) |
| 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) |
| 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) |