Origin:

Humeral head: Medial epicondylar ridge and common flexor tendon

Ulnar head: Coronoid process of ulna

Insertion:

Middle of lateral surface of radius

Action:

Forearm pronation; assists in elbow flexion

Innervation:

Median Nerve

Origin:

Medial epicondyle of humerus

Insertion:

Base of 2nd and 3rd metacarpal bones

Action:

Wrist flexion, radial deviation, Assist in elbow flexion

Innervation:

Median Nerve

Origin:

Medial Epicondyle of humerus

Insertion:

Transverse carpal ligament and palmar aponeurosis

Action:

Wrist flexion and assists in elbow flexion

Innervation:

Median Nerve

Origin:

Humeral head:Medial epicondyle of humerus

Ulnar head: Olecranon

Insertion:

Pisiform, hamate, and 5th metacarpal

Action:

Wrist flexion, ulnar deviation, assist in elbow flexion

Innervation:

Ulnar Nerve

Origin:

Humeral head:Medial epicondyle of humerus

Ulnar head: Coronoid Process

Radial head: Oblique line of radius

Insertion:

Palmar surface of middle phalanx of medial 4 digits

Action:

Flex middle phalanges (PIP)  of medial 4 digits, aids in wrist and forearm flexion

Innervation:

Median Nerve

Origin:

Medial and anterior surface of ulna and interosseous membrane

Insertion:

Base of distal phalanges of medial 4 digits

Action:

MCP, PIP, DIP flexion; Wrist flexion

Innervation:

Median Nerve (2nd and 3rd digit)

Ulnar Nerve (4th and 5th digit)

Origin:

Anterior surface of radius and interosseous membrane; Coronoid process of ulna

Insertion:

Base of distal phalanx of the thumb

Action:

Thump CMC, MCP, IP joint flexion; Wrist Flexion

Innervation:

Median Nerve

Origin:

Distal ¼ of the anterior surface of the ulna

Insertion:

Distal ¼ of the anterior surface of the radius

Action:

Forearm pronation

Innervation:

Median Nerve

Origin:

Supracondylar ridge of humerus

Insertion:

Styloid process of radius

Action:

Elbow flexion; pronation from supinated position to neutral; supination from pronated position to neutral

Innervation:

Radial Nerve

Origin:

Lateral supracondylar ridge; lateral epicondyle

Insertion:

Dorsal surface of base of 2nd metacarpal

Action:

Wrist extension, radial deviation, assist with elbow extension

Innervation:

Radial Nerve

Origin:

Lateral epicondyle of humerus

Insertion:

Dorsal surface of base of 3rd metacarpal

Action:

Wrist extension, radial deviation, assist with elbow extension

Innervation:

Radial Nerve

Origin:

Lateral epicondyle of humerus

Insertion:

Bases of middle and distal phalanges of medial 4 digits

Action:

MCP extension of medial 4 digits, assists with wrist and elbow extension

Innervation:

Radial Nerve

Origin:

Lateral epicondyle of humerus

Insertion:

Medial side of base of 5th metacarpal

Action:

Wrist extension, ulnar deviation, assist with elbow extension

Innervation:

Radial Nerve

Origin:

     Lateral Epicondyle

Insertion:

Lateral surface of the olecranon process and posterior surface of ulna

Action:

     Extension of Elbow

Innervation:

     Radial Nerve