Elbow & Forearm Flashcards
Biceps brachii
O: Long head: Supraglenoid tubercle of the scapula
Short head: Coracoid process
I: Radial tuberosity, and bicipital aponeurosis
A: Elbow: flexion; Forearm: supination
Long head: Shoulder abduction and flexion
In: Musculocutaneous n.
Brachialis
O: Anterior surface of the humerus, intermuscular septum
I: Ulnar tuberosity, Coronoid process
A: Elbow: flexion
In: Musculocutaneous n.
Triceps brachii
O: Long head: infraglenoid tubercle of the scapula
Medial head: posterior surface of humerus, medial intermuscular septum
Lateral head: posterior surface of humerus, lateral intermuscular septum
I: Olecranon
A: Elbow: extension
Shoulder: extension (Long head)
In: Radial n.
Anconeus
O: Lateral epicondyle of the humerus
I: Olecranon
A: Elbow: extension
In: Radial n.
Pronator teres
O: Humeral head: Medial epicondyle (common flexor tendon)
Ulnar head: coronoid process of ulna
I: Lateral surface of the radius
A: Elbow: weakly flexion
Forearm: pronation
In: Median n.
Flexor digitorum superficialis
Humeroulnar head: medial epicondyle of the humerus (common flexor tendon) and coronoid process of ulna
Radial head: Radial tuberosity
I: Middle phalanges II-V
A: Wrist flexion; MCP and PIP II-V: flexion
In: Median n.
Flexor digitorum profundus
O: Interosseus membrane, proximal 3/4 of the anterior surface of the ulna
I: Palmar surface of the distal phalanges II-V
A: Wrist, MCP, PIP, DIP II-V: flexion
In: Median and ulnar nn.
Flexor carpi radialis
O: Medial epicondyle of the humerus (common flexor tendon)
I: Base of the metacarpal II
A: Elbow: flexion
Forearm: pronation
Wrist: flexion and abduction
In: Median n.
Flexor carpi ulnaris
O: Humeral head: Medial epicondyle of the humerus (common flexor tendon)
Ulnar head: Olecranon
I: Hook of the hamate, base of metacarpal V, pisiformis
A: Wrist: flexion and adduction
Elbow: flexion
In: Ulnar n.
Palmaris longus
O: Medial epicondyle of humerus
I: Palmar aponeurosis
A: Wrist flexion by tightening the aponeurosis
In: Median n.
Brachioradialis
O: Lateral surface of the distal humerus, intermuscular septum
I: Styloid process of the radius
A: Elbow: flexion
Forearm: pronation/supination
In: Radial n.
Extensor carpi radialis longus
O: Lateral supracondylar crest
I: Dorsal surface of metacarpal II
A: Wrist: extension and abduction
Elbow: flexion
In: Radial n.
Extensor carpi radialis brevis
O: Lateral epicondyle of the humerus
I: Dorsal surface of the metacarpal III
A: Wrist: extension and abduction
Elbow: flexion
In: Radial n.
Extensor digitorum
O: Lateral epicondyle of humerus
I: Middle and distal phalanges II-V via dorsal aponeurosis
A: Wrist: extension
MCP, PIP, DIP: extension, abduction
In: Radial n.
Extensor carpi ulnaris
O: Common head: lateral epicondyle of humerus
Ulnar head: dorsal surface
I: Base metacarpal V
A: Wrist: extension, adduction
Elbow: extension
In: Radial n.
Supinator
O: Supinator crest, Lateral epicondyle of humerus
I: Proximal third of radius
A: Radioulnar joint: supination
In: Radial n.
Pronator quadratus
O: Distal quarter of anterior surface of the ulna
I: Distal quarter of anterior surface of the radius
A: Radioulnar joint: pronation
In: Median n.
