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136 Cards in this Set
- Front
- Back
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Biceps brachii: Origin
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Short head:apex of coracoid process of scapulaLong head:supraglenoid tubercle of scapula
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Biceps brachii: Insertion
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Tuberosity of radius and fascia of forearm via bicipital aponeurosis
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Biceps brachii: Innervation
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Musculocutaneous nerve (C5-C6)
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Biceps brachii: Main Actions
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Supinates flexed forearm; flexes forearm at elbow
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Brachialis: Origin
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Distal half of anterior humerus
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Brachialis: Insertion
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Coronoid process and tuberosity of ulna
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Brachialis: Innervation
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Musculocutaneous nerve (C5-C6), and contribution from radial nerve (C7)
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Brachialis: Main Actions
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Flexes forearm at elbow in all positions
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Coracobrachialis: Origin
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Tip of coracoid process of scapula
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Coracobrachialis: Insertion
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Middle third of medial surface of humerus
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Coracobrachialis: Innervation
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Musculocutaneous nerve (C5-C7)
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Coracobrachialis: Main Actions
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Helps to flex and adduct arm at shoulder
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Triceps brachii: Origin
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Long head:infraglenoid tubercle of scapula Lateral head:posterior surface of humerus Medial head:posterior surface of humerus, inferior to radial groove |
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Triceps brachii: Insertion
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Posterior surface of olecranon of ulna and fascia of forearm
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Triceps brachii: Innervation
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Radial nerve (C6-C8)
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Triceps brachii: Main Actions
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Extends forearm at elbow; is chief extensor of elbow; steadies head of abducted humerus (long head)
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Anconeus: Origin
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Lateral epicondyle of humerus
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Anconeus: Insertion
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Lateral surface of olecranon and superior part of posterior surface of ulna
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Anconeus: Innervation
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Radial nerve (C6-C8)
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Anconeus: Main Actions
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Assists triceps in extending elbow; abducts ulna during pronation
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Pronator teres: Origin
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Medial epicondyle of humerus and coronoid process of ulna
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Pronator teres: Insertion |
Middle of lateral surface of radius
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Pronator teres: Innervation
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Median nerve (C6-C7)
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Pronator teres: Main Actions
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Pronates forearm and flexes elbow
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Flexor carpi radialis: Origin
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Medial epicondyle of humerus
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Flexor carpi radialis: Insertion
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Base of 2nd metacarpal bone
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Flexor carpi radialis: Innervation
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Median nerve (C6-C7)
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Flexor carpi radialis: Main Actions
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Flexes hand at wrist and abducts it
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Palmaris longus: Origin
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Medial epicondyle of humerus
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Palmaris longus: Insertion
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Distal half of flexor retinaculum and palmar aponeurosis
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Palmaris longus: Innervation
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Median nerve (C7-C8)
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Palmaris longus: Main Actions
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Flexes hand at wrist and tightens palmar aponeurosis
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Flexor carpi ulnaris: Origin
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Humeral head: medial epicondyle of humerusUlnar head: olecranon and posterior border of ulna
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Flexor carpi ulnaris: Insertion
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Pisiform bone, hook of hamate bone, and 5th metacarpal bone
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Flexor carpi ulnaris: Innervation
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Ulnar nerve (C7-T1)
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Flexor carpi ulnaris: Main Actions
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Flexes hand at wrist and adducts it
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Flexor digitorum superficialis: Origin
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Humero-ulnar head: medial epicondyle of humerus, ulnar collateral ligament, and coronoid process of ulna Radial head: superior half of anterior radius |
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Flexor digitorum superficialis: Insertion
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Bodies of middle phalanges of medial four digits
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Flexor digitorum superficialis: Innervation
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Median nerve (C8-T1)
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Flexor digitorum superficialis: Main Actions
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Flexes middle phalanges of medial four digits; also weakly flexes proximal phalanges, forearm, and wrist
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Flexor digitorum profundus: Origin
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Proximal of medial and anterior surfaces of ulna and interosseous membrane
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Flexor digitorum profundus: Insertion
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Palmar bones of distal phalanges of medial four digits
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Flexor digitorum profundus: Innervation
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Medial part:ulnar nerve Lateral part:median nerve |
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Flexor digitorum profundus: Main Actions
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Flexes distal phalanges of medial four digits; assists with flexion of wrist
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Flexus pollicis longus: Origin
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Anterior surface of radius and adjacent interosseous membrane
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Flexus pollicis longus: Insertion
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Base of distal phalanx of thumb
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Flexus pollicis longus: Innervation
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Median nerve (anterior interosseous)
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Flexus pollicis longus: Main Actions
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Flexes phalanges of 1st digit (thumb)
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Pronator quadratus: Origin
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Distal of anterior surface of ulna
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Pronator quadratus: Insertion
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Distal of anterior surface of radius
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Pronator quadratus: Innervation
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Median nerve (anterior interosseous) (C7-C8)
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Pronator quadratus: Main Actions
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Pronates forearm and hand
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Brachioradialis: Origin
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Proximal of lateral supracondylar ridge of humerus
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Brachioradialis: Insertion
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Lateral surface of distal end of radius
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Brachioradialis: Innervation
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Radial nerve (C5-C6)
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Brachioradialis: Main Actions
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Flexes mid-pronated forearm at elbow
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Extensor carpi radialis longus: Origin
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Lateral supracondylar ridge of humerus
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Extensor carpi radialis longus: Insertion
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Base of 2nd metacarpal bone
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Extensor carpi radialis longus: Innervation
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Radial nerve (C6-C7)
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Extensor carpi radialis longus: Main Actions
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Extends and abducts hand at wrist
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Extensor carpi radialis brevis: Origin
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Lateral epicondyle of humerus
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Extensor carpi radialis brevis: Insertion
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Base of 3rd metacarpal bone
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Extensor carpi radialis brevis: Innervation
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Radial nerve (deep branch) (C7)
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Extensor carpi radialis brevis: Main Actions
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Extends and abducts hand at wrist
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Extensor digitorum: Origin
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Lateral epicondyle of humerus
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Extensor digitorum: Insertion
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Extensor expansions of medial four digits
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Extensor digitorum: Innervation
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Radial nerve (posterior interosseous) (C7-C8)
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Extensor digitorum: Main Actions
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Extends medial four digits at MCP joints; extends hand at wrist joint
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Extensor digiti minimi: Origin
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Lateral epicondyle of humerus
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Extensor digiti minimi: Insertion
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Extensor expansion of 5th digit
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Extensor digiti minimi: Innervation
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Radial nerve (posterior interosseous)
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Extensor digiti minimi: Main Actions
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Extends 5th digit at MCP and IP joints
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Extensor carpi ulnaris: Origin
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Lateral epicondyle of humerus and posterior border of ulna
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Extensor carpi ulnaris: Insertion
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Base of 5th metacarpal bone
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Extensor carpi ulnaris: Innervation
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Radial nerve (posterior interosseous)
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Extensor carpi ulnaris: Main Actions
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Extends and adducts hand at wrist
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Supinator: Origin
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Lateral epicondyle of humerus; radial collateral, and anular ligaments; supinator fossa; and crest of ulna
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Supinator: Insertion
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Lateral, posterior, and anterior surfaces of proximal third of radius
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Supinator: Innervation
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Radial nerve (deep branch) (C6-C7)
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Supinator: Main Actions
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Supinates forearm, i.e., rotates radius to turn palm anteriorly
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Abductor pollicis longus: Origin
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Posterior surfaces of ulna, radius, and interosseous membrane
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Abductor pollicis longus: Insertion
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Base of 1st metacarpal bone
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Abductor pollicis longus: Innervation
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Radial nerve (posterior interosseous)
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Abductor pollicis longus: Main Actions
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Abducts thumb and extends it at CMC joint
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Extensor pollicis brevis: Origin
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Posterior surfaces of radius and interosseous membrane
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Extensor pollicis brevis: Insertion
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Base of proximal phalanx of thumb
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Extensor pollicis brevis: Innervation
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Radial nerve (posterior interosseous)
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Extensor pollicis brevis: Main Actions
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Extends proximal phalanx of thumb at CMC joint
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Extensor pollicis longus: Origin
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Posterior surfaces of middle third of ulna and interosseous membrane
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Extensor pollicis longus: Insertion
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Base of distal phalanx of thumb
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Extensor pollicis longus: Innervation
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Radial nerve (posterior interosseous) (C7-C8)
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Extensor pollicis longus: Main Actions
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Extends distal phalanx of thumb at MCP and IP joints
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Extensor indicis: Origin
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Posterior surfaces of ulna and interosseous membrane
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Extensor indicis: Insertion
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Extensor expansion of 2nd digit
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Extensor indicis: Innervation
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Radial nerve (posterior interosseous) (C7-C8)
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Extensor indicis: Main Actions
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Extends 2nd digit and helps to extend hand at wrist
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Deltoid: Origin
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Lateral third of clavicle, acromion, and spine of scapula
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Deltoid: Insertion
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Deltoid tuberosity of humerus
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Deltoid: Innervation
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Axillary nerve (C5-C6)
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Deltoid: Main Actions
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Anterior part: flexes and medially rotates arm at shoulder Middle part: abducts arm at shoulder Posterior part: extends and laterally rotates arm at shoulder |
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Supraspinatus (rotator cuff muscle): Origin
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Supraspinous fossa of scapula
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Supraspinatus (rotator cuff muscle): Insertion
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Superior facet on greater tubercle of humerus
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Supraspinatus (rotator cuff muscle): Innervation
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Suprascapular nerve (C5-C6)
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Supraspinatus (rotator cuff muscle): Main Actions
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Helps deltoid abduct arm at shoulder and acts with rotator cuff muscles
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Infraspinatus (rotator cuff muscle): Origin
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Infraspinous fossa of scapula and deep fascia
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Infraspinatus (rotator cuff muscle): Insertion
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Middle facet on greater tubercle of humerus
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Infraspinatus (rotator cuff muscle): Innervation
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Suprascapular nerve (C5-C6)
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Infraspinatus (rotator cuff muscle): Main Actions
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Laterally rotates arm at shoulder; helps to hold head in glenoid cavity
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Teres minor (rotator cuff muscle): Origin
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Lateral border of scapula
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Teres minor (rotator cuff muscle): Insertion
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Inferior facet on greater tubercle of humerus
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Teres minor (rotator cuff muscle): Innervation
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Axillary nerve (C5-C6)
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Teres minor (rotator cuff muscle): Main Actions
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Laterally rotates arm at shoulder; helps to hold head in glenoid cavity
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Teres major: Origin
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Dorsal surface of inferior angle of scapula
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Teres major: Insertion
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Medial lip of intertubercular sulcus of humerus
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Teres major: Innervation
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Lower subscapular nerve (C5-C6)
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Teres major: Main Actions
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Adducts arm and medially rotates shoulder
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Subscapularis (rotator cuff muscle): Origin
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Subscapular fossa of scapula
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Subscapularis (rotator cuff muscle): Insertion
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Lesser tubercle of humerus
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Subscapularis (rotator cuff muscle): Innervation
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Upper and lower subscapular nerves (C5-C6)
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Subscapularis (rotator cuff muscle): Main Actions
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Medially rotates arm at shoulder and adducts it; helps to hold humeral head in glenoid cavity
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Pectoralis major: Origin
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Medial half of clavicle; sternum; superior six costal cartilages; aponeurosis of external abdominal oblique
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Pectoralis major: Insertion
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Intertubercular sulcus of humerus
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Pectoralis major: Innervation
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Lateral (C5-C7) and medial pectoral (C8-T1) nerves
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Pectoralis major: Main Actions
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Flexes, adducts, and medially rotates arm at shoulder
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Pectoralis minor: Origin
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3rd to 5th ribs and deep fascia
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Pectoralis minor: Insertion
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Coracoid process of scapula
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Pectoralis minor: Innervation
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Medial pectoral nerve (C8-T1)
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Pectoralis minor: Main Actions
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Depresses and protracts scapula
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Serratus anterior: Origin
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Upper eight ribs
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Serratus anterior: Insertion
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Medial border of scapula
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Serratus anterior: Innervation
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Long thoracic nerve (C5-C7)
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Serratus anterior: Main Actions
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Rotates scapula upward and pulls it anterior toward thoracic wall
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Subclavius: Origin
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Junction of 1st rib and costal cartilage
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Subclavius: Insertion
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Inferior surface of clavicle
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Subclavius: Innervation
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Nerve to subclavius (C5-C6)
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Subclavius: Main Actions
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Depresses and anchors clavicle
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