Reading...
Play button
Play button
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;
14 Cards in this Set
- Front
- Back
|
Coracobrachialis
|
Origin: coracoid process of the scapula
Insertion: medial shaft of the humerus at about its middle Action: flexes the humerus assists to adduct the humerus |
|
|
Biceps brachii
|
Origin:
long head- supraglenoid tubercle and glenohumeral labrum short head- tip of the coracoid process of the scapula Insertion: radial tuberosity bicipital aponeurosis Action: flexes the forearm at the elbow (when supinated) supinates forearm from neutral stabilizes anterior aspect of shoulder flexes shoulder (weak if at all) |
|
|
Brachialis
|
Origin:
lower 1/2 of anterior humerus both intermuscular septa Insertion: ulnar tuberosity coronoid process of ulna slightly Action: elbow flexion (major mover) |
|
|
Triceps brachii
|
Origin:
long head - infraglenoid tubercle of the scapula lateral head - upper half of the posterior surface of the shaft of the humerus, and the upper part of the lateral intermuscular septum medial head - posterior shaft of humerus, distal to radial groove and both the medial and lateral intermuscular septum (deep to the long & lateral heads) Insertion: posterior surface of the olecranon process of the ulna deep fascia of the antebrachium Action: long - adducts the arm, extends at the shoulder, and a little elbow flexion lateral - extends the forearm at the elbow medial - extends the forearm at the elbow |
|
|
Pronator teres
|
Origin:
humeral head: upper portion of medial epicondyle via the CFT (common flexor tendon) medial brachial intermuscular septum ulnar head - coronoid process of ulna antebrachial fascia Insertion: lateral aspect of radius at the middle of the shaft (pronator tuberosity) Action: pronates forearm (during rapid or forced pronation) weakly flexes the elbow |
|
|
Flexor carpi radialis
|
Origin:
medial epicondyle via the CFT (common flexor tendon) antebrachial fascia Insertion: base of the 2nd and sometimes 3rd metacarpals Action: flexes the hand at the wrist radially deviates the wrist may assist to pronate the forearm |
|
|
Flexor carpi ulnaris
|
Origin:
humeral head - medial epicondyle via the CFT (common flexor tendon) ulnar head: medial aspect of olecranon proximal 3/5 of dorsal ulnar shaft antebrachial fascia Insertion: pisiform & hamate bones (via the pisohamate ligament) base of the 5th metacarpal (via the pisometacarpal ligament) Action: flexes the hand at the wrist ulnarly deviates the wrist stabilizes wrist to permit powerful thumb motion |
|
|
Flexor digitorum profundus
|
Origin:
anterior & medial surface of upper 3/4 ulna adjacent interosseous membrane Insertion: distal phalanx of medial 4 digits (through FDS tunnel) Action: flexes the distal IP joints and in so doing flexes the proximal and middle IP joints flexes the wrist if fingers are extended |
|
|
Flexor pollicis longus
|
Origin:
middle anterior surface of the radius interosseous membrane (may also originate from lateral boarder of coronoid process or medial epicondyle) Insertion: palmar aspect of base of the distal phalanx of thumb (deep to flexor retinaculum) Action: flexes the distal phalanx of the thumb (IP joint) flexes the other joints to the wrist (McP, CMc and weakly at the wrist) |
|
|
Pronator quadratus
|
Origin: distal 1/4 anteriomedial surface of ulna
Insertion: distal 1/4 anteriolateral surface of radius Action: pronates the forearm and hand |
|
|
Brachioradialis
|
Origin:
upper lateral supracondylar ridge of humerus (between the triceps and brachialis muscles) lateral intermuscular septum of humerus Insertion: superior aspect of styloid process of radius lateral side of the distal 1/2 to 1/3 of the radius antebrachial fascia Action: flexes the forearm at the elbow pronates the forearm when supinated supinates the forearm when pronated |
|
|
Extensor digitorum
|
Origin:
lateral epicondyle via the CET (common extensor tendon) antebrachial fascia Insertion: base of middle phalanx of each of the four fingers (central band) base of distal phalanx of each of the four fingers (2 lateral bands) Action: extends the four medial digits extends the wrist if fingers flexed abducts the digits (spreads the digits as it extends them) |
|
|
Supinator
|
Origin:
lateral epicondyle of humerus supinator crest of ulna radial collateral ligament annular ligament antebrachial fascia Insertion: proximal portion of anteriorlateral surface of the radius Action: supinates the forearm |
|
|
Lumbricals
|
Origin:
tendon of flexor digitorum profundus 1 & 2 have a single head of origin (from radial aspect of tendon) 3 & 4 have two heads of origin (each head from an adjacent tendon) Insertion: extensor hood of digits 2-5 Action: flexes the fingers (at the McP joints) extend IPs |
