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Muscle Flash Cards
Origin, Insertion, Action, Innervation
| Question | Answer |
|---|---|
| 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 humerusNerve: musculocutaneous nerve, C5,6,(C7) Blood: muscular branches of the brachial artery |
| Biceps brachii (Origin, Insertion) | Origin: long head- supraglenoid tubercle and glenohumeral labrum; short head- tip of the coracoid process of the scapula Insertion: radial tuberosity, bicipital aponeurosis |
| Biceps brachii (Action, Innervation) | flexes the forearm at the elbow (when supinated), supinates forearm from neutral, stabilizes anterior aspect of shoulder, flexes shoulder (weak if at all); Nerve: musculocutaneous nerve, C5,6 |
| Brachialis | Origin: lower 1/2 of anterior humerus, both intermuscular septa; Insertion: ulnar tuberosity, coronoid process of ulna slightly; Action: elbow flexion (major mover); Nerve: musculocutaneous nerve, C5,6 |
| Triceps brachii (Origin) | long head - infraglenoid tubercle of scap, lat head - upp half of post shaft of humerus, and upp pt of lat intermuscular septum, lat head - upper 1/2 of posterior shaft of humerus, dist to rdl groove and both the medial and lateral intermuscular septum |
| Triceps brachii (Insertion) | posterior surface of the olecranon process of the ulna, deep fascia of the antebrachium |
| Triceps brachii (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 |
| Triceps Brachii (Innervation) | radial nerve, C6,7 |
| Anconeus (Origin, Insertion) | Origin: posterior surface of the lateral epicondyle of the humerus, Insertion: lateral aspect of olecranon extending to the lateral part of ulnar body |
| Anconeus (Action, Innervation) | Action: extends the forearm at the elbow, supports the elbow when in full extension; Nerve: radial nerve, C7,8 |
| Pronator teres (Origin) | 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 |
| Pronator teres (Insertion, Action, Innervation) | 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; Nerve: median nerve, C6,7 |
| 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 Nerv |
| Palmaris longus | Origin: medial epicondyle via the CFT (common flexor tendon) antebrachial fascia Insertion: central portion of the flexor retinaculum superficial portion of the palmar aponeurosis Action: flexes the hand at the wrist Nerve: median nerve, C6,7 |
| Flexor carpi ulnaris (Origin.Insertion) | Origin: humeral head - medial epicondyle via CFT (common flexor tendon); ulnar head: medial aspect of olecranon proximal 3/5 of dorsal ulnar shaft antebrachial fascia; Insertion: pisiform & hamate bones (via pisohamate ligament) base of 5th metacarpal |
| Flexor Carpi Ulnaris (Action, Innervation) | Action: flexes the hand at the wrist ulnarly deviates the wrist stabilizes wrist to permit powerful thumb motion; Nerve: ulnar nerve, C8,T1 |
| Flexor digitorum superficialis (Origin) | Origin: humeral-ulnar head: medial epicondyle via CFT (common flexor tendon), med boarder of base of coronoid process of ulna, med (ulnar) collateral ligament, antebrachial fascia; radial head: oblique line of radius along its upper ant boarder |
| Flexor digitorum superficialis (Insertion, Action, Innervation) | Insertion: both sides of the base of each middle phalanx of the 4 fingers; Action: flexes the proximal and middle phalanges flexes the wrist if fingers are extended; Nerve: median nerve, C7,8,T1 |
| Flexor digitorum profundus (Origin,Insertion, Action) | 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 |
| Flexor digitorum profundus (Innervation) | Nerve: medial portion - ulnar nerve, C8,T1 lateral portion - anterior interosseous branch of median nerve, C8,T1 |
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