University:
Western Sydney University
Course:
MEDI 2003 | Clinical Sciences 2
Academic year:

2024
Views:

305

Pages:

3
Author:

Mariam A. A.

Posterior Compartment Superficial layer Muscle Brachioradialis (more prominent ant.) Anconeus Origin Lateral (humerus) Posterior epicondyle Insertion Innervation condyle Lateral distal Radial Nerve radius lateral Posterior Radial Nerve proximal ulna Extensor carpi Lateral condyle radialis longus* humerus Extensor carpi Lateral epicondyle radialis brevis* humerus Extensor digitorum* Extensor minimi* Extensor ulnaris* Lateral epicondyle humerus digiti Lateral epicondyle humerus carpi Lateral epicondyle humerus of Dorsal surface base of 2nd metacarpal of Dorsal surface base of 3rd metacarpal of Extensor hoods at base of middle + distal phalanges (index to little finger) of Extensor hood of little finger of Base of 5th metacarpal Radial Nerve Function Accessory forearm flexor Ulna abduction during pronation + accessory elbow extensor Wrist extension + abduction Radial Nerve Wrist extension + abduction Radial Nerve Digit extension Radial Nerve Extend little finger Radial Nerve Adduct + extend wrist Deep Layer Muscle Supinator Abductor longus* Extensor brevis* Origin • Lateral epicondyle of humerus • Radial collateral ligament • Annular ligament • Supinator crest of ulnar pollicis Posterior surface of proximal half of radius, ulna, and interosseus membrane Insertion Lateral, posterior and anterior surfaces of the proximal radius Base metacarpal bone (trapezium bone) Innervation Posterior interosseous nerve (C7, C8) of Posterior interosseous 1 nerve (C7, C8) pollicis Posterior surface of Posterior Posterior distal third of radius aspect of base interosseous and interosseus of proximal nerve (C7, C8) membrane Function Proximal radioulnar forearm supination • joint: Radiocarpal joint: hand extension • Carpometacarpal joint: thumb abduction and extension Carpometacarpal and metacarpophalangeal joint 1: Thumb extension Extensor longus* phalanx of thumb pollicis Posterior surface of Posterior Posterior middle third of ulna aspect of base interosseous and interosseus of distal nerve (C7, C8) membrane phalanx of thumb Extensor indicis* Posterior surface of Extensor distal third of ulna and expansion interosseous index finger membrane Posterior of interosseous nerve (C7, C8) • • • • Wrist joints: weak hand extension Metacarpophalangeal and interphalangeal joint of the thumb” thumb extension Wrist joints: weak hand extension Metacarpophalangeal and interphalangeal joints of index finger: Finger extension *Extrinsic muscles of the hand Blood Vessels and Nerves Need to know origin, course and major branches Arteries • • • Radial and ulnar - Superficial palmar arches - Dep palmar arches Veins - Cephalic - Basilic Nerves - Radial - Median - Ulnar The wrist and the hand Important note: the carpal bones and arranged in rows of four. They articulate with the forearm and the metacarpals. Identify • • • • • • • • Scaphoid Lunate Triquetrum Pisiform Trapezium Trapezoid Capitate Hamate • Five metacarpals’ numbers medial to lateral (1-5)