| tendon sheath of tibialis anterior muscle | <anatomy> The synovial sheath, deep to the extensor retinaculum, that surrounds the tendon of the tibialis anterior as it crosses the ankle. Synonym: vagina tendinis musculi tibialis anterioris. (05 Mar 2000) |
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| tendon sheath of tibialis posterior muscle | <anatomy> The synovial sheath surrounding the tendon of the tibialis posterior as it passes into the foot deep to the flexor retinaculum. Synonym: vagina tendinis musculi tibialis posterioris. (05 Mar 2000) |
| tendon sheath syndrome | <syndrome> Limited elevation of the eye in adduction, appearing clinically as a paresis of the inferior oblique muscle, due to fascia contracting the superior oblique muscle on the same side. Synonym: Brown's syndrome, Paterson-Brown-Kelly syndrome. (05 Mar 2000) |
| tendon suture | Suture of the divided ends of a tendon. Synonym: tendinosuture, tendon suture, tenosuture. Origin: teno-+ G. Rhaphe, suture (05 Mar 2000) |
| tendon transfer | Surgical procedure by which a tendon is incised at its insertion and placed at an anatomical site distant from the original insertion. The tendon remains attached at the point of origin and takes over the function of a muscle inactivated by trauma or disease. (12 Dec 1998) |
| tendon transplantation | Insertion of a slip from the tendon of a sound muscle into the tendon of a paralysed muscle, replacement of a length of tendon by a free graft. (05 Mar 2000) |
| trefoil tendon | A three-lobed fibrous sheet occupying the centre of the diaphragm. Synonym: centrum tendineum diaphragmatis, trefoil tendon. Central tendon of perineum, the fibromuscular mass between the anal canal and the urogenital diaphragm in the median plane; midline episiotomies extend into this structure. Synonym: centrum tendineum perinei, perineal body, Savage's perineal body. (05 Mar 2000) |
| Zinn's tendon | A fibrous ring that surrounds the optic canal and the medial part of the superior orbital fissure; it gives origin to the four rectus muscles of the eye and is partially fused with the sheath of the optic nerve. Synonym: annulus tendineus communis, Zinn's ligament, Zinn's ring, Zinn's tendon. (05 Mar 2000) |
| abdominocardiac reflex | Mechanical stimulation (usually distention) of abdominal viscera causing changes (usually a slowing) in the heart rate or the occurrence of extrasystoles. (05 Mar 2000) |
| Abrams' heart reflex | A contraction of the myocardium when the skin of the precordial region is irritated. (05 Mar 2000) |
| accommodation reflex | Increased convexity of the lens, due to contraction of the ciliary muscle and relaxation of the suspensory ligament, to maintain a distinct retinal image. (05 Mar 2000) |
| Achilles 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) |
| acousticopalpebral reflex | A form of the wink reflex in which there is a contraction, sometimes very slight, of the orbicularis palpebrarum muscle when a sudden noise is made close to the ear; it is absent in labyrinthine disease with total deafness. Synonym: acousticopalpebral reflex, auropalpebral reflex, cochleo-orbicular reflex, startle reflex. (05 Mar 2000) |
| acquired 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) |
| acromial reflex | Contraction of the biceps muscle caused by a tap on the acromion or the coracoid process. (05 Mar 2000) |