| UN | ulnar nerve; undernourished; unilateral neglect; urea nitrogen; urinary nitrogen |
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| UNCV | ulnar nerve conduction velocity |
| UTS | Ullrich-Turner syndrome; ulnar tunnel syndrome; ultimate tensile strength |
| ulnar artery | <anatomy, artery> The larger of the two terminal branches of the brachial artery, beginning about one centimeter distal to the bend of the elbow. Like the radial artery, its branches may be divided into three groups corresponding to their locations in the forearm, wrist, and hand. (12 Dec 1998) |
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| ulnar branch of medial antebrachial cutaneous nerve | <anatomy, nerve> Branch of the medial antebrachial cutaneous nerve supplying the skin of the medial portion of the proximal two-thirds of the dorsal side of the forearm. Synonym: ramus ulnaris nervi cutanei antebrachii medialis. (05 Mar 2000) |
| ulnar bursa | The synovial sheath that surrounds the eight tendons of the superficial and deep flexors of the digits of the hand as they pass through the carpal canal; it is commonly continuous with the digital sheath of the little finger. Synonym: vagina communis musculorum flexorum, ulnar bursa. (05 Mar 2000) |
| ulnar clubhand | Clubhand with angular deviation toward ulnar side of limb. See: manus vara. (05 Mar 2000) |
| ulnar collateral ligament | The triangular ligament extending from the medial epicondyle of the humerus to the medial side of the coronoid process and olecranon of the ulna. Synonym: ligamentum collaterale ulnare, medial collateral ligament of elbow, ulnar collateral ligament. (05 Mar 2000) |
| ulnar collateral ligament of elbow | The triangular ligament extending from the medial epicondyle of the humerus to the medial side of the coronoid process and olecranon of the ulna. Synonym: ligamentum collaterale ulnare, medial collateral ligament of elbow, ulnar collateral ligament. (05 Mar 2000) |
| ulnar collateral ligament of wrist | A ligament that passes from the styloid process of the ulna to the pisiform and triquetrum. Synonym: ligamentum collaterale carpi ulnare, internal collateral ligament of the wrist, medial ligament of wrist. (05 Mar 2000) |
| ulnar communicating branch of superficial radial nerve | <anatomy, nerve> Ulnar communicating branch of superficial branch of radial nerve, joining the dorsal branch of the ulnar nerve in the hand conveying sensation from the dorsal aspect of adjacent sides of the middle and ring fingers. Synonym: ramus communicans ulnaris nervi radialis. (05 Mar 2000) |
| ulnar eminence | An eminence smaller than the radial, on the ulnar side of the palmar aspect of the wrist, due to presence of the pisiform bone. Synonym: eminentia carpi ulnaris. (05 Mar 2000) |
| ulnar extensor muscle of wrist | <anatomy, muscle> Origin, lateral epicondyle of humerus (humeral head) and oblique line and posterior border of ulna (ulnar head); insertion, base of fifth metacarpal bone; action, extends and abducts wrist ulnarward; nerve supply, radial (posterior interosseous). Synonym: musculus extensor carpi ulnaris, ulnar extensor muscle of wrist. (05 Mar 2000) |
| ulnar flexor muscle of wrist | <anatomy, muscle> Origin, humeral head from medial condyle of humerus, ulnar head from olecranon and upper three-fifths of posterior border of ulna; insertion, pisiform bone, but is continued to the fifth metacarpal bone via the pisometacarpal ligament; action, flexes and abducts wrist ulnarward; nerve supply, ulnar. Synonym: musculus flexor carpi ulnaris, ulnar flexor muscle of wrist. (05 Mar 2000) |
| ulnar head | The name applied to a head of origin of a forearm muscle arising from the ulna. Nomina Antomica lists ulnar heads (caput ulnare...) of the following: 1) flexor carpi ulnaris muscle (... Musculi flexoris carpi ulnaris ); 2) pronator teres muscle (... Musculi pronatoris teritis ). Synonym: caput ulnare. (05 Mar 2000) |
| ulnar margin of forearm | An imaginary line extrapolated from the medial epicondyle of the humerus to the styloid process of the ulna, forming a border between the anterior and posterior surfaces. Synonym: margo medialis antebrachii, margo ulnaris antebrachii, ulnar margin of forearm. (05 Mar 2000) |
| ulnar nerve | <anatomy, nerve> A major nerve of the upper extremity. In humans, the fibres of the ulnar nerve originate in the lower cervical and upper thoracic spinal cord (usually c7 to t1), travel via the medial cord of the brachial plexus, and supply sensory and motor innervation to parts of the hand and forearm. (12 Dec 1998) |
| ulnar nerve compression syndrome | <syndrome> A condition caused by compression or entrapment of the ulnar nerve. It may involve both sensory and motor problems and most often results from compression or entrapment of the ulnar nerve at the elbow (cubital tunnel syndrome). Compression of the nerve may occur during normal activities or as a complication of general anaesthesia. (12 Dec 1998) |