| tendon sheath of abductor pollicis longus and extensor pollicis brevis muscles | The synovial sheath lining the compartment of the extensor retinaculum that contains the abductor pollicis longus and extensor pollicis brevis tendons. Synonym: vagina tendinum musculorum abductoris longi et extensoris brevis pollicis. (05 Mar 2000) |
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| tendon sheath of extensor carpi radialis muscles | The synovial sheath lining the compartment of the extensor retinaculum containing the tendons of the extensor carpi radialis longus and brevis muscles. Synonym: vagina tendinum musculorum extensorum carpi radialium. (05 Mar 2000) |
| tendon sheath of extensor carpi ulnaris muscle | The synovial sheath surrounding the tendon of the extensor carpi ulnaris in its course deep to the extensor retinaculum. Synonym: vagina tendinis musculi extensoris carpi ulnaris, peritenon. (05 Mar 2000) |
| tendon sheath of extensor digiti minimi muscle | <anatomy> The synovial sheath surrounding the tendon of the extensor digiti minimi in its passage deep to the extensor retinaculum. Synonym: vagina tendinis musculi extensoris digiti minimi. (05 Mar 2000) |
| tendon sheath of extensor digitorum longus muscle of foot | The synovial sheath that surrounds the tendons of the extensor digitorum longus muscle and the peroneus tertius in their passage across the ankle. Synonym: vagina tendinum musculi extensoris digitorum pedis longi. (05 Mar 2000) |
| tendon sheath of extensor hallucis longus muscle | <anatomy> The synovial sheath that surrounds the tendon of the extensor hallucis longus in its passage across the ankle. Synonym: vagina tendinis musculi extensoris hallucis longi. (05 Mar 2000) |
| tendon sheath of extensor pollicis longus muscle | <anatomy> The synovial sheath surrounding the extensor pollicis longus tendon in its passage deep to the extensor retinaculum. Synonym: vagina tendinis musculi extensoris pollicis longi. (05 Mar 2000) |
| extensor | <anatomy> A muscle which serves to extend or straighten any part of the body, as an arm or a finger; opposed to flexor. Origin: L, one who stretches. See Extend. Source: Websters Dictionary (01 Mar 1998) |
| extensor aponeurosis | 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) |
| extensor carpi radialis brevis | <anatomy, muscle> Origin, lateral epicondyle of humerus; insertion, base of third metacarpal bone; action, extends and abducts wrist radialward; nerve supply, radial. Synonym: musculus extensor carpi radialis brevis, short radial extensor muscle of wrist. (05 Mar 2000) |
| extensor carpi radialis longus | <anatomy, muscle> Origin, lateral supracondylar ridge of humerus; insertion, back of base of second metacarpal bone; action, extends and deviates wrist radialward; nerve supply, radial. Synonym: musculus extensor carpi radialis longus, long radial extensor muscle of wrist. (05 Mar 2000) |
| extensor carpi ulnaris | <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) |
| 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) |
| extensor digiti minimi | <anatomy, muscle> Origin, lateral epicondyle of humerus; insertion, dorsum of proximal, middle, and distal phalanges of little finger; action, extends fingers; nerve supply, radial (posterior interosseous). Synonym: musculus extensor digiti minimi, extensor muscle of little finger, musculus extensor digiti quinti proprius, musculus extensor minimi digiti. (05 Mar 2000) |
| extensor digitorum | <anatomy, muscle> Origin, lateral epicondyle of humerus; insertion, by four tendons into the base of the proximal and middle and base of the second and third phalanges of 4 fingers; action, extends fingers and hand; nerve supply, radial (posterior interosseous). Synonym: musculus extensor digitorum, extensor muscle of fingers, musculus extensor digitorum communis. (05 Mar 2000) |