| tonic reflex | The occurrence of an appreciable interval after the production of a reflex before relaxation, e.g., the leg remains up for a time after a knee jerk. Synonym: Gordon's symptom. (05 Mar 2000) |
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| trace conditioned reflex | A conditioned reflex established by applying the stimulus a short time before reinforcement; in the conditioned reflex of the animal so prepared, the response occurs at the same interval of time after the application of the stimulus as during the period of training. (05 Mar 2000) |
| trained 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) |
| enterogastric reflex | Peristaltic contraction of the small intestine induced by the entrance of food into the stomach. See: gastrocolic reflex. (05 Mar 2000) |
| triceps reflex | A sudden contraction of the triceps muscle caused by a smart tap on its tendon when the forearm hangs loosely at a right angle with the arm. Synonym: elbow jerk, elbow reflex. (05 Mar 2000) |
| triceps surae reflex | A contraction of the calf muscles when the tendo calcaneus is sharply struck. Synonym: ankle jerk, ankle reflex, tendo Achillis reflex, triceps surae reflex. (05 Mar 2000) |
| epigastric reflex | A contraction of the upper portion of the rectus abdominis muscle when the skin of the epigastrium above is scratched. Synonym: supraumbilical reflex. (05 Mar 2000) |
| trigeminofacial reflex | Contraction of the orbicularis oculi muscle induced by tapping the supraorbital nerve. Synonym: McCarthy's reflexes, trigeminofacial reflex. (05 Mar 2000) |
| erector-spinal reflex | A contraction of part of the erector spinae muscle following scratching of the skin on its outer border. (05 Mar 2000) |
| trochanter reflex | Contraction of the adductor muscles of the thigh elicited by a tap on the trochanter. (05 Mar 2000) |
| Tromner's reflex | A modified Rossolimo reflex in which, with the fingers of the patient partially flexed, the tapping of the volar aspect of the tip of the middle or index finger causes flexion of all four fingers and thumb; seen in pyramidal tract lesions with moderate spasticity. (05 Mar 2000) |
| Jacobson's reflex | Flexion of the fingers elicited by tapping the flexor tendons over the wrist joint or the lower end of the radius. (05 Mar 2000) |
| jaw reflex | A spasmodic contraction of the temporal muscles following a downward tap on the loosely hanging mandible. Synonym: chin jerk, chin reflex, jaw jerk, mandibular reflex, masseter reflex. (05 Mar 2000) |
| jaw-working reflex | <syndrome> An increase in the width of the eye lids during chewing, sometimes with a rhythmic elevation of the upper lid when the mouth is open and ptosis when the mouth is closed. Synonym: Gunn phenomenon, Gunn's syndrome, jaw-winking phenomenon, jaw-working reflex, Marcus Gunn phenomenon, Marcus Gunn syndrome. (05 Mar 2000) |
| Joffroy's reflex | Twitching of the glutei muscles when firm pressure is made on the nates, in cases of spastic paralysis. Synonym: hip phenomenon. (05 Mar 2000) |