Term
| Abductor digiti minimi (hand) |
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Definition
ORIGIN
Pisiform bone, pisohamate ligament and flexor retinaculum |
[image] |
INSERTION
Ulnar side of base of proximal phalanx of little finger and extensor expansion |
ACTION
Abducts little finger at metacarpophalangeal joint |
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Term
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Definition
ORIGIN
Tubercle of scaphoid & flexor retinaculum |
[image] |
INSERTION
Radial sesamoid of proximal phalanx of thumb & tendon of extensor pollicis longus |
ACTION
Abducts thumb at metacarpophalangeal & carpometacarpal joints |
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Term
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Definition
ORIGIN
Upper posterior surface of ulna and middle third of posterior surface of radius and interosseous membrane between |
[image] |
INSERTION
Over tendons of radial extensors and brachioradialis to base of 1st metacarpal and trapezium |
ACTION
Abducts and extends thumb at carpometacarpal joint |
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Term
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Definition
ORIGIN
Oblique head: base of 2nd and 3rd metacarpals, trapezoid and capitate. Transverse head: palmar border and shaft of 3rd metacarpal |
[image] |
INSERTION
Ulnar sesamoid then ulnar side of base of proximal phalanx and tendon of extensor pollicis longus |
ACTION
Adducts carpometacarpal joint of thumb |
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Term
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Definition
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Term
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Definition
ORIGIN
Smooth surface at lower extremity of posterior aspect of lateral epicondyle of humerus |
[image] |
INSERTION
Lateral side of olecranon |
ACTION
Weak extensor of elbow. Moves (abducts) ulna in pronation |
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Term
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Definition
ORIGIN
Long head:supraglenoid tubercle of scapula. Short head: coracoid process of scapula with coracobrachialis |
[image] |
INSERTION
posterior border of bicipital tuberosity of radius (over bursa) and bicipital aponeurosis to deep fascia and subcutaneous ulna |
ACTION
Supinates forearm, flexes elbow, weakly flexes shoulder |
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Term
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Definition
ORIGIN
Anterior lower half of humerus and medial and lateral intermuscular septa |
[image] |
INSERTION
Coronoid process and tuberosity of ulna |
ACTION
Flexes elbow |
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Term
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Definition
ORIGIN
Upper two thirds of lateral supracondylar ridge of humerus and lateral intermuscular septum |
[image] |
INSERTION
Base of styloid process of radius |
ACTION
Flexes arm at elbow and brings forearm into midprone position |
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Term
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Definition
ORIGIN
Coracoid process of scapula with biceps brachii |
[image] |
INSERTION
Upper half medial border of humerus |
ACTION
Flexes and weakly adducts arm |
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Term
| Extensor carpi radialis brevis |
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Definition
ORIGIN
Common extensor origin on anterior aspect of lateral epicondyle of humerus |
[image] |
INSERTION
Posterior base of 3rd metacarpal |
ACTION
Extends and abducts hand at wrist |
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Term
| Extensor carpi radialis longus |
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Definition
ORIGIN
Lower third of lateral supracondylar ridge of humerus and lateral intermuscular septum |
[image] |
INSERTION
Posterior base of 2nd metacarpal |
ACTION
Extends and abducts hand at wrist |
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Term
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Definition
ORIGIN
Common extensor origin on anterior aspect of lateral epicondyle of humerus |
[image] |
INSERTION
Base of 5th metacarpal via groove by ulnar styloid |
ACTION
Extends and adducts hand at wrist |
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Term
| Extensor digiti minimi (hand) |
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Definition
ORIGIN
Common extensor origin on anterior aspect of lateral epicondyle of humerus |
[image] |
INSERTION
Extensor expansion of little finger-usually two tendons which are joined by a slip from extensor digitorum at metacarpophalangeal joint |
ACTION
Extends all joints of little finger |
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Term
| Extensor digitorum (hand) |
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Definition
ORIGIN
Common extensor origin on anterior aspect of lateral epicondyle of humerus |
[image] |
INSERTION
External expansion to middle and distal phalanges by four tendons. Tendons 3 and 4 usually fuse and little finger just receives a slip |
ACTION
Extends all joints of fingers |
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Term
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Definition
ORIGIN
Lower posterior shaft of ulna (below extensor pollicis longus) and adjacent interosseous membrane |
[image] |
INSERTION
Extensor expansion of index finger (tendon lies on ulnar side of extensor digitorum tendon) |
ACTION
Extends all joints of index finger |
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Term
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Definition
ORIGIN
Lower third of posterior shaft of radius and adjacent interosseous membrane |
[image] |
INSERTION
Over tendons of radial extensors and brachioradialis to base of proximal phalanx of thumb |
ACTION
Extends metacarpophalangeal joint of thumb |
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Term
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Definition
ORIGIN
Middle third of posterior ulna (below abductor pollicis longus) and adjacent interosseous membrane |
[image] |
INSERTION
Base of distal phalanx of thumb via Lister's tubercle (dorsal tubercle of radius). |
ACTION
Extends interphalangeal and metacarpophalangeal joints of thumb |
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Term
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Definition
ORIGIN
Common flexor origin of medial epicondyle of humerus |
[image] |
INSERTION
Bases of 2nd and 3rd metacarpals via groove in trapezium and slip to scaphoid |
ACTION
Flexes and abducts wrist |
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Term
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Definition
ORIGIN
Humeral head: common flexor origin of medial epicondyle. Ulnar head: aponeurosis from medial olecranon and upper three quarters subcutaneous border of ulna |
[image] |
INSERTION
Pisiform, hook of hamate, base of 5th metacarpal via pisohamate and pisometacarpal ligaments |
ACTION
Flexes and adducts wrist. Fixes pisiform during action of hypothenar muscles |
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Term
| Flexor digiti minimi brevis (hand) |
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Definition
ORIGIN
Flexor retinaculum and hook of hamate |
[image] |
INSERTION
Ulnar side of base of proximal phalanx of little finger |
ACTION
Flexes metacarpophalangeal joint of little finger |
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Term
| Flexor digitorum profundus (hand) |
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Definition
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 |
[image] |
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 |
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Term
| Flexor digitorum superficialis (hand) |
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Definition
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 |
[image] |
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 |
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Term
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Definition
RIGIN
Flexor retinaculum and tubercle of trapezium |
[image] |
INSERTION
Base of proximal phalanx of thumb (via radial sesamoid) |
ACTION
Flexes metacarpophalangeal joint of thumb |
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Term
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Definition
ORIGIN
Anterior surface of radius below anterior oblique line and adjacent interosseous membrane |
[image] |
INSERTION
Base of distal phalanx of thumb |
ACTION
Flexes distal phalanx of thumb |
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Term
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Definition
ORIGIN
Bipennate from inner aspects of shafts of all metacarpals |
[image] |
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 |
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Term
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Definition
ORIGIN
Anteriorshafts of 2, 4, 5 metacarpals (unipennate) |
[image] |
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 |
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Term
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Definition
ORIGIN
Four tendons of flexor digitorum profundus. Radial 2: radial side only (unipennate). Ulnar 2: cleft between tendons ( bipennate) |
[image] |
INSERTION
Extensor expansion (dorsum of proximal phalanx ) of fingers 2-5 radial side |
ACTION
Flex metacarpophalangeal joints and extend interphalangeal joints of fingers |
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Term
| Opponen digiti minimi (hand) |
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Definition
ORIGIN
Flexor retinaculum and hook of hamate |
[image] |
INSERTION
Ulnar border of shaft of 5th metacarpal |
ACTION
Opposes (flexes and laterally rotates) carpometacarpal and metacarpophalangeal joints of little finger |
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Term
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Definition
ORIGIN
Flexor retinaculum and tubercle of trapezium |
[image] |
INSERTION
Whole of radial border of 1st metacarpal |
ACTION
Opposes (medially rotates and flexes ) carpometacarpal and metacarpophalangeal joints of thumb |
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Term
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Definition
ORIGIN
Common flexor origin of medial epicondyle of humerus |
[image] |
INSERTION
Flexor retinaculum and palmar aponeurosis |
ACTION
Flexes wrist and tenses palmar aponeurosis |
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Term
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Definition
ORIGIN
Lower quarter of anteromedial shaft of ulna |
[image] |
INSERTION
Lower quarter of anterolateral shaft of radius and some interosseous membrane |
ACTION
Pronates forearm and maintains ulna and radius opposed |
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Term
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Definition
ORIGIN
Humeral head: medial epicondyle, medial supracondylar ridge and medial intermuscular septum. Ulnar head: medial border of coronoid process |
[image] |
INSERTION
Just posterior to most prominent part of lateral convexity of radius |
ACTION
Pronates forearm and flexes elbow |
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Term
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Definition
ORIGIN
Deep part (horizontal):supinator crest and fossa of ulna. Superficial part (downwards): lateral epicondyle and lateral ligament of elbow and annular ligament |
[image] |
INSERTION
Neck and shaft of radius, between anterior and posterior oblique lines |
ACTION
Supinates forearm. Only acts alone when elbow extended |
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Term
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Definition
ORIGIN
Long head: infraglenoid tubercle of scapula. lateral head: upper half posterior humerus (linear origin). medial head: lies deep on lower half posterior humerus inferomedial to spiral groove and both intermuscular septa |
[image] |
INSERTION
Posterior part of upper surface of olecranon process of ulna and posterior capsule |
ACTION
Extends elbow. Long head stabilizes shoulder joint. medial head retracts capsule of elbow joint on extension |
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