| digital rectal exam | An exam to detect rectal cancer. The doctor inserts a lubricated, gloved finger into the rectum and feels for abnormal areas. It is also an important screening test for the detection of prostate abnormalities, including cancer. (12 Dec 1998) |
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| digital 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) |
| digital subtraction angiography | Computer-assisted roentgenographic angiography permitting visualization of vascular structures without superimposed bone and soft tissue density; images made before and after contrast injection allow subtraction (separation and removal) of opacities not enhanced by the contrast medium. Other image-processing can be performed. Contrast material may be injected intravenously or in lower-than-usual amount intra-arterially. (05 Mar 2000) |
| digital veins | See: dorsal digital veins of foot, palmar digital veins, plantar digital veins. (05 Mar 2000) |
| digital whorl | <botany> A ring of leaves, bracts or floral parts borne at the same level on a main stem. (13 Nov 1997) |
| dorsal digital artery | <anatomy, artery> One of the collateral digital branches of the dorsal metatarsal arteries in the foot, and/or of the dorsal metacarpal arteries in the hand. Synonym: arteria digitalis dorsalis. (05 Mar 2000) |
| dorsal digital nerves | Terminal branches of the radial and ulnar nerves in the hand supplying the skin of the dorsal surface of the proximal and middle phalanges of the fingers. Synonym: nervi digitales dorsales, dorsal digital nerves. (05 Mar 2000) |
| dorsal digital nerves of foot | Nerves supplying the skin of the dorsal aspect of the proximal and middle phalanges of the toes. Synonym: nervi digitales dorsales pedis, dorsal nerves of toes. (05 Mar 2000) |
| dorsal digital nerves of hand | Terminal branches of the radial and ulnar nerves in the hand supplying the skin of the dorsal surface of the proximal and middle phalanges of the fingers. Synonym: nervi digitales dorsales, dorsal digital nerves. (05 Mar 2000) |
| dorsal digital veins of foot | They receive intercapitular veins from the plantar venous arch, join to form four common dorsal digital veins, and terminate in the dorsal venous arch. Synonym: venae digitales dorsales pedis, dorsal digital veins of toes. (05 Mar 2000) |
| infantile digital fibromatosis | Multiple fibrous flesh-coloured nodules on the extensor aspect of the terminal phalanges of adjacent digits of infants and young children which often recur after attempted excision, do not metastasize, and may spontaneously regress in two to three years; composed of spindle cells containing cytoplasmic inclusions believed to be derived from myofibrils. Synonym: infantile digital fibromatosis. (05 Mar 2000) |
| tendinous chiasm of the digital tendons | Crossing of the tendons, the passage of the tendons of the flexor digitorum profundus (flexor digitorum longus in the foot) through the interval left by the decussation of the fibres of the tendons of the flexor digitorum superficialis (flexor digitorum brevis in the foot). Synonym: chiasma tendinum, Camper's chiasm. (05 Mar 2000) |
| extensor digital expansion | A triangular tendinous aponeurosis including the tendon of the extensor digitorum centrally, interosseus tendons on each side, and a lumbrical tendon laterally. It covers the dorsal aspect of the metacarpophalangeal joint and the proximal phalanx. Synonym: dorsal hood, extensor aponeurosis, extensor expansion. (05 Mar 2000) |
| annulus of fibrous sheath | One of the two circular fibrous bands of the fibrous sheaths of the fingers and toes attached to the shaft of the proximal and middle phalanges. Synonym: pars annularis vaginae fibrosae, annular pulley, annulus of fibrous sheath, ligamentum annulare digitorum. (05 Mar 2000) |
| cardiac fibrous skeleton | A complex framework of dense collagen forming four fibrous rings (annuli fibrosi), which surround the ostia of the valves, a right and left fibrous trigone, formed by connecting the rings, and the membranous portions of the interatrial and interventricular septa; it is found in association with the base of the ventricles, i.e., at the level of the coronary sulcus; its functions include: 1) contributing reinforcement of the valvular ostia while providing attachment for the leaflets and cusps of the valves; 2) providing origin and insertion for the myocardium; and 3) serving as a sort of electrical "insulator," separating the electrically conducted impulses of the atria and ventricles and providing passage for the common atrioventricular bundle of conductive tissue through the right fibrous trigone and membranous interventricular septum. Synonym: cardiac fibrous skeleton, cardiac skeleton, skeleton of heart. (05 Mar 2000) |