| ulnar reflex | Pronation and adduction of the hand caused by tapping the styloid process of the ulna. Synonym: pronator reflex. (05 Mar 2000) |
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| ulnar styloid erosions | <radiology> Seen in rheumatoid arthritis, related to: triangular fibrocartilage, prestyloid recess (of joint space), extensor carpi ulnaris tendon (12 Dec 1998) |
| ulnar variance | <radiology> Ulna minus variance ulna shorter than radius increased frequency of avascular necrosis of lunate associated with DISI, ulna plus variance ulna longer than radius increased stress on triangular fibrocartilage (12 Dec 1998) |
| ulnar veins | Venae comitantes of the ulnar artery, continuing from those of the supericial palmar arch and joining with those of the radial artery to form the brachial veins in the cubital fossa. Synonym: venae ulnares. (05 Mar 2000) |
| palmar | 1. <anatomy> Pertaining to, or corresponding with, the palm of the hand. 2. <ornithology> Of or pertaining to the under side of the wings of birds. Origin: L. Palmaris, fr. Palma the palm of the hand: cf. F. Palmaire. Source: Websters Dictionary (01 Mar 1998) |
| palmar aponeurosis | The thickened, central portion of the fascia ensheathing the hand; it radiates toward the bases of the fingers from the tendon of the palmaris longus muscle. Synonym: aponeurosis palmaris, Dupuytren's fascia, palmar fascia. (05 Mar 2000) |
| palmar carpal ligament | Thickening of distal antebrachial fascia just proximal to radiocarpal (wrist) joint. Continuous with extensor retinaculum at margins of forearm. This structure is distinct from the transverse carpal ligament, commonly called "the flexor retinaculum," which forms the roof of the carpal tunnel. Synonym: flexor retinaculum of forearm, palmar carpal ligament. (05 Mar 2000) |
| palmar carpometacarpal ligaments | Fibrous bands that connect the palmar surfaces of the carpal and metacarpal bones. Synonym: ligamentum carpometacarpalia palmaria. (05 Mar 2000) |
| palmar crease | Any of the several flexion crease's normally found on the palm of the hand, occurring proximal to, but as a consequence of flexion at, the metacarpophalangeal joints. (05 Mar 2000) |
| palmar digital veins | Paired venae comitantes of the proper and common digital arteries that empty into the superficial palmar venous arch. Synonym: venae digitales palmares. (05 Mar 2000) |
| palmar fascia | The thickened, central portion of the fascia ensheathing the hand; it radiates toward the bases of the fingers from the tendon of the palmaris longus muscle. Synonym: aponeurosis palmaris, Dupuytren's fascia, palmar fascia. (05 Mar 2000) |
| palmar fibromatosis | Nodular fibroplastic proliferation in the palmar fascia of one or both hands, preceding or associated with Dupuytren's contracture. (05 Mar 2000) |
| palmar flexion | Turning the hand or fingers toward the palmar surface. (05 Mar 2000) |
| palmar interosseous artery | <anatomy, artery> One of the three arteries springing from the deep palmar arch and running in the three medial interosseous spaces; they anastomose with the common palmar and dorsal metacarpal arteries. Synonym: arteria metacarpea palmaris, palmar interosseous artery. (05 Mar 2000) |
| palmar interosseous muscle | <anatomy> Three muscles in the hand; origin, first: ulnar side of second metacarpal; second and third: radial sides of fourth and fifth metacarpals; insertion, first: into ulnar side of index; second and third: into radial sides of ring and little fingers; action, adducts fingers toward axis of middle finger; nerve supply, ulnar. See: flexor pollicis brevis muscle. Synonym: musculus interosseus palmaris, musculus interosseus volaris. (05 Mar 2000) |