| exstrophy of the bladder | A congenital gap in the anterior wall of the bladder and the abdominal wall in front of it, the posterior wall of the bladder being exposed. Synonym: ectopia vesicae. (05 Mar 2000) |
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| unstable bladder | Characterised by uninhibited detrusor contractions. (05 Mar 2000) |
| urinary bladder | A musculomembranous elastic bag serving as a storage place for the urine. Synonym: vesica urinaria, cystis urinaria, urocyst, urocystis. (05 Mar 2000) |
| uvula of bladder | A slight projection into the cavity of the bladder, usually more prominent in old men, just behind the urethral opening, marking the location of the middle lobe of the prostate. Synonym: uvula vesicae, Lieutaud's uvula. (05 Mar 2000) |
| lateral ligaments of the bladder | Condensations of fibroareolar tissue which pass one from each side of the bladder to blend with the pelvic fascia; smooth muscle is usually present in this tissue and is referred to as the musculus rectovesicalis. (05 Mar 2000) |
| fundus of urinary bladder | The fundus is formed by the posterior wall which is somewhat convex. Synonym: fundus vesicae urinariae, bas-fond, base of bladder. (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) |
| acute reflex bone atrophy | Atrophy of bones, commonly of the carpal or tarsal bones, following a slight injury such as a sprain. See: causalgia, reflex sympathetic dystrophy. Synonym: acute reflex bone atrophy, posttraumatic osteoporosis, Sudeck's syndrome. Origin: L. English sweat (05 Mar 2000) |
| adductor reflex | Contraction of the adductors of the thigh caused by tapping the tendon of the adductor magnus muscle while the thigh is abducted. (05 Mar 2000) |