5367500
Description
Flashcards by cryptic_arcana, updated more than 1 year ago
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Created by cryptic_arcana
over 8 years ago
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| Question | Answer |
| Anterior compartment of forearm - superficial muscles | From medial to lateral: 1 - Flexor carpi ulnaris 2 - Flexor digitorum superficialis 3 - Palmaris longus 4 - Flexor carpi radialis 5 - Pronator teres |
| Flexor carpi ulnaris | Origin: Medial epicondyle (humeral head) and olecranon (ulnar head) Insertion: Base of 5th metacarpal, pisiform, hook of hamate Action: Wrist flexion and adduction Nerve: Ulnar nerve Artery: Ulnar artery |
| Flexor digitorum superficialis | Origin: Medial epicondyle (primarily); also ulnar collateral ligament and proximal radius and ulna Insertion: Bases of middle phalanges of digits 2-5 Action: PIPJ flexion (primarily); also wrist and MCPJ flexion Nerve: Median nerve Artery: Ulnar artery |
| Palmaris longus | Origin: Medial epicondyle Insertion: Flexor retinaculum and palmar aponeurosis Action: Wrist flexion Nerve: Median nerve Artery: Ulnar artery Absent in 14% of people |
| Flexor carpi radialis | Origin: Medial epicondyle Insertion: Base of 2nd metacarpal (small slips to 3rd metacondyle and trapezium) Action: Wrist flexion and abduction Nerve: Median nerve Artery: Radial artery Runs through the flexor retinaculum in a separate compartment of the carpal tunnel |
| Pronator teres | Origin: Medial supracondylar ridge and common flexor tendon (humeral head); coronoid process (ulnar head) Insertion: Lateral radius, just distal to supinator Action: Forearm pronation, elbow flexion Nerve: Median nerve Artery: Radial and ulnar arteries |
| Anterior compartment of forearm - deep muscles | Flexor digitorum profundus Flexor pollicis longus Pronator quadratus |
| Flexor digitorum profundus | Origin: Anteromedial ulna and interosseous membrane Insertion: Base of distal phalanges. Gives rise to lumbricals Action: DIPJ flexion (primarily) but also flexes PIPJ, MCPJ and wrist joint Nerve: Anterior interosseous nerve (2nd and 3rd digits); median nerve (4th and 5th digits) Artery: Anterior interosseous artery |
| Flexor pollicis longus | Origin: Anterior surface of radius and adjacent interosseous membrane Insertion: Base of distal phalanx of thumb Action: Thumb flexion Nerve: Anterior interosseous nerve Artery: Anterior interosseous artery |
| Pronator quadratus | Origin: Medial and anterior surface of distal ulna Insertion: Anterior and lateral surface of distal radius Action: Forearm pronation Nerve: Anterior interosseous nerve Artery: Anterior interosseous artery |
| Posterior compartment of forearm - superficial muscles | 'Lateral compartment muscles': Brachioradialis Extensor carpi radialis longus Extensor carpi radialis brevis Other muscles: Extensor digitorum Extensor digiti minimi Extensor carpi ulnaris |
| Brachioradialis | Origin: Lateral supracondylar ridge of humerus Insertion: Radial styloid Action: Elbow flexion. Pronation when forearm is supinated, supination when forearm is pronated. Nerve: Radial nerve Artery: Radial recurrent artery |
| Extensor carpi radialis longus | Origin: Lateral supracondylar ridge of humerus; a few fibres from lateral epicondyle Insertion: Base of 2nd metacarpal Action: Wrist extension and abduction. Weak elbow flexion. Nerve: Radial nerve Artery: Radial artery Passes beneath abductor pollicis longus, extensor pollicis brevis and extensor retinaculum |
| Extensor carpi radialis brevis | Origin: Lateral epicondyle, radial collateral ligament of elbow Insertion: Base of 3rd metacarpal Action: Wrist extension and abduction. Weak elbow flexion. Nerve: Radial nerve (deep branch) Artery: Radial artery Passes under extensor retinaculum |
| Extensor digitorum | Origin: Lateral epicondyle Insertion: Extensor expansion of 2nd-5th digits (spanning proximal and middle phalanges) Action: Finger and wrist extension Nerve: Radial nerve Artery: Posterior interosseous artery |
| Extensor digiti minimi | Origin: Lateral epicondyle Insertion: Base of extensor expansion of 5th finger Action: 5th finger and wrist extension Nerve: Posterior interosseous nerve Artery: Posterior interosseous artery |
| Extensor carpi ulnaris | Origin: Lateral epicondyle of humerus, posterior border of ulna Insertion: Base of 5th metacarpal Action: Wrist extension and adduction Nerve: Deep branch of radial nerve Artery: Ulnar artery |
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