Origin, Insertion, Action, Innervation
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| 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
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| 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
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| 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
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| 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
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| 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
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| Triceps brachii (Insertion) | posterior surface of the olecranon process of the ulna, deep fascia of the antebrachium
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| 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
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| Triceps Brachii (Innervation) | radial nerve, C6,7
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| 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
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| Anconeus (Action, Innervation) | Action: extends the forearm at the elbow,
supports the elbow when in full extension; Nerve: radial nerve, C7,8
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| 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
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| 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
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| 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
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| 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
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| 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
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| 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
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| 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
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| 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
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| 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
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| 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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