Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
13 Cards in this Set
- Front
- Back
|
Pronator quadratus
|
ORIGIN: Lower quarter of anteromedial shaft of ulna
INSERTION: Lower quarter of anterolateral shaft of radius and some interosseous membrane ACTION: Pronates forearm and maintains ulna and radius opposed |
|
|
Flexor digitorum superficialis
|
ORIGIN: Humeral head: common flexor origin of medial epicondyle humerus, medial ligament of elbow. Ulnar head: medial border of coronoid process and fibrous arch. Radial head: whole length of anterior oblique line
INSERTION: Tendons split to insert onto sides of middle phalanges of medial four fingers ACTION: Flexes proximal interphalangeal joints and secondarily metacarpophalangeal joints and wrist |
|
|
Flexor Digitorum profundus
|
ORIGIN: Medial olecranon, upper three quarters of anterior and medial surface of ulna as far round as subcutaneous border and narrow strip of interosseous membrane
INSERTION: Distal phalanges of medial four fingers. Tendon to index finger separates early ACTION: Flexes distal interphalangeal joints, then secondarily flexes proximal interphalangeal and metacarpophalangeal joints and wrist |
|
|
Lumbrical muscles
(METACARPAL MUSCLE GROUP) |
ORIGIN: Four tendons of flexor digitorum profundus. Radial 2: radial side only (unipennate). Ulnar 2: cleft between tendons ( bipennate)
INSERTION: Extensor expansion (dorsum of proximal phalanx ) of fingers 2-5 radial side ACTION: Flex metacarpophalangeal joints and extend interphalangeal joints of fingers |
|
|
Dorsal Interosseous muscles
(METACARPAL MUSCLE GROUP) |
ORIGIN: Bipennate from inner aspects of shafts of all metacarpals
INSERTION: Proximal phalanges and dorsal extensor expansion on radial side of index and middle fingers and ulnar side of middle and ring fingers ACTION: Abduct from axis of middle finger. Flex metacarpophalangeal joint while extending interphalangeal joints |
|
|
Abductor Pollicis Brevis
(THENAR MUSCLE GROUP) |
ORIGIN: Tubercle of scaphoid & flexor retinaculum
INSERTION: Radial sesamoid of proximal phalanx of thumb & tendon of extensor pollicis longus ACTION: Abducts thumb at metacarpophalangeal & carpometacarpal joints |
|
|
Adductor Pollicis Longus (THENAR MUSCLE GROUP)
|
ORIGIN: Upper posterior surface of ulna and middle third of posterior surface of radius and interosseous membrane between
INSERTION: Over tendons of radial extensors and brachioradialis to base of 1st metacarpal and trapezium ACTION: Abducts and extends thumb at carpometacarpal joint |
|
|
Opponens Pollicis
(THENAR MUSCLE GROUP) |
ORIGIN: Flexor retinaculum and tubercle of trapezium
INSERTION: Whole of radial border of 1st metacarpal ACTION: Opposes (medially rotates and flexes ) carpometacarpal and metacarpophalangeal joints of thumb |
|
|
Flexor Pollicis Brevis
(THENAR MUSCLE GROUP) |
ORIGIN: Flexor retinaculum and tubercle of trapezium
INSERTION: Base of proximal phalanx of thumb (via radial sesamoid) ACTION: Flexes metacarpophalangeal joint of thumb |
|
|
Abductor Digiti Minimi
(HYPOTHENAR MUSCLE GROUP) |
ORIGIN: Pisiform bone, pisohamate ligament and flexor retinaculum
INSERTION: Ulnar side of base of proximal phalanx of little finger and extensor expansion ACTION: Abducts little finger at metacarpophalangeal joint |
|
|
Flexor Digiti Minimi
Brevis (HYPOTHENAR MUSCLE GROUP) |
ORIGIN: Flexor retinaculum and hook of hamate
INSERTION: Ulnar side of base of proximal phalanx of little finger ACTION: Flexes metacarpophalangeal joint of little finger |
|
|
Opponens Digiti Minimi
(HYPOTHENAR MUSCLE GROUP) |
ORIGIN: Flexor retinaculum and hook of hamate
INSERTION: Ulnar border of shaft of 5th metacarpal ACTION: Opposes (flexes and laterally rotates) carpometacarpal and metacarpophalangeal joints of little finger |
|
|
Palmer Interosseous muscles
(METACARPAL MUSCLE GROUP) |
ORIGIN: Anteriorshafts of 2, 4, 5 metacarpals (unipennate)
INSERTION: Proximal phalanges and dorsal extensor expansion on ulnar side of index and radial side of ring and little fingers and to ulnar sesamoid of thumb ACTION: Adduct to axis of middle finger. Flex metacarpophalangeal joint while extending interphalangeal joints |
