Muscles Actions/Attachments/Innervation of forearm

Pronator Teres Proximal Attachment

Humeral head- medial epicondyle of humerous and common flexor tendon

Pronator Teres Distal Attachment

Middle of lateral surface of radius

Pronator Teres Action

Pronates Arm

Pronator Teres Innervation

Median nerve (C6, C7)

Flexor Carpi Radialis Proximal Attachment

Common Flexor Tendon

Flexor Carpi Radialis Distal Attachment

Base of 2nd and 3rd metacarpals

Flexor Carpi Radialis Action

Flexion/radial deviation of wrist

Flexor Carpi Radialis Innvervation

Median nerve (C6, C7)

Flexor Carpi Ulnaris Proximal Attachment

-Humeral head - common flexor tendon

-Ulnar Head - olecranon process of ulna

Flexor Carpi Ulnaris Distal Attachment

pisiform, hamate, base of 5th metacarpal

Flexor Carpi Ulnaris Action

Flexion/ulnar deviation of wrist

Flexor Carpi Ulnaris Innervation

Ulnar nerve (C7, C8)

Flexor Digitorum Superficialis Proximal Attachment

-Humeral Head - common flexor tendon

-Ulnar head - coronoid process of ulna

Flexor Digitorum Superficialis Distal Attachment

Medial and lateral sides of middle phalanges of 2nd and 5th digits

Flexor Digitorum Superficialis Action

-Flexion of PIPs and MCPs of 2nd-5th digits

-Flexion of wrist

Flexor Digitorum Superficialis Innervation

Median nerve (C7, C8, T1)

Flexor Digitorum Profundus Proximal Attachment

Medial and anterior surfaces of ulna and interosseus membrane

Flexor Digitorum Profundus Distal Attachment

Base of distal phalanges of digits 2-5

Flexor Digitorum Profundus Action

-Flexions of MCPs, PIPs, and DIPs of 2nd-5th digits

-Flexion of wrist

Flexor Digitorum Profundus Inneration

-Median nerve (Anterior Interosseus) for 2nd and 3rd digits (C6,C7)

-Ulnar nerve for 4th and 5th digits (C8,T1)

Flexor Pollicis Longus Proximal Attachment

volar surface of radius, interosseus membrane, coronoid process of ulna

Flexor Pollicis Longus Distal Attachment

Palmar base of distal phalanx of thumb

Flexor Pollicis Longus Action

flexion of CMC, IP, and MCP joint of the thumb

Flexor Pollicis Longus Innervation

Median nerve (Anterior Interosseus) (C8, T1)

Brachioradialis Proximal Attachment

proximal 2/3 of supracondylar ridge of humerus

Brachioradialis Distal Attachment

Styloid process of radius

Brachioradialis Action

Flexes elbow when in neutral + Pronation/supination to neutral

Brachioradialis innervation

Radial nerve (C5, C6, C7)

Pronator Quadratus Proximal Attachment

Distal 1/4 of anterior surface of ulna

Pronator Quadratus Distal Attachment

Distal 1/4 of lateral border of volar surface of radius

Pronator Quadratus Action

Pronates forearm

Pronator Quadratus Innervation

Median nerve (Anterior Interosseus) (C8, T1)

Supinator Proximal Attachment

lateral epicondyle of humerus; radial collateral and anular ligaments; supinator fossa; crest of ulna

Supinator Distal Attachment

Proximal 1/3 of lateral and anterior surface of radius

Supinator Action

supinates forearm

Supinator Innervation

Deep Radial nerve (C5, C6)

Extensor Carpi Radialis Longus Proximal Attachment

-Distal 1/3 of supracondylar ridge of humerous

-common extensor tendon

Extensor Carpi Radialis Longus Distal Attachment

Dorsal base of 2nd metacarpal

Extensor Carpi Radialis Longus Action

Extension/radial deviation of wrist/elbow flexion

Extensor Carpi Radialis Longus Innervation

Radial nerve (C6, C7)

Extensor Carpi Radialis Brevis Proximal Attachment

-Common extensor tendon

-Radial collateral ligament

Extensor Carpi Radialis Brevis Distal Attachment

Dorsal base of 3rd metacarpal

Extensor Carpi Radialis Brevis Action

Wrist extension/radial deviation of wrist/elbow flexion

Extensor Carpi Radialis Brevis Innervation

Deep Radial nerve (C7, C8)

Extensor Digitorum Proximal Attachment

Common extensor tendon

Extensor Digitorum Distal Attachment

Base of middle and distal phalanges of 2nd-5th digits

Extensor Digitorum Action

Extension of DIPs, PIPs, MCPs 2-5 and the wrist

Extensor Digitorum Innervation

Radial nerve (Posterior Interosseus) (C7, C8)

Extensor Carpi Ulnaris Proximal Attachment

Common extensor tendon

Extensor Carpi Ulnaris Distal Attachment

Base of 5th metacarpal

Extensor Carpi Ulnaris Action

Extenion/ulnar deviation of wrist

Extensor Carpi Ulnaris Innervation

Radial nerve (Posterior Interosseus) (C7, C8)

Extensor pollicis Longus Proximal Attachment

Middle 1/3 of posterior surface of ulna, interosseus membrane

Extensor Pollicis Longus Distal Attachment

Base of distal phalange of thumb

Extensor Pollicis Longus Action

1st CMC, MCP, and IP extension

Extensor Pollicis Longus Innervation

Radial nerve (Posterior Interosseus) (C7, C8)

Abductor Pollicis Longus Proximal Attachment

Posterior surface of ulna, interosseus membrane

Abductor Pollicis Longus Distal Attachment

Radial side of base of first metacarpal

Abductor Pollicis Longus Action

Abduction and extension of CMC joint of thumb

Abductor Pollicis Innervation

Radial Nerve (Posterior Interosseus) (C7, C8)

Extensor Digiti Minimi Action

Extension of 5th digit and wrist extension

Extensor Digiti Minimi Innervation

Radial Nerve (Posterior Interosseus)

Extensor Indicis Action

Extension of MCP, PIP, and DIP of 2nd digit and wrist extension

Extensor Indicis Innervation

Radial Nerve (Posterior Interosseus)

Anconeus Action

Elbow Extension

Anconeus Innervation

Radial Nerve

Extensor Pollicis Brevis Action

1st CMC and MCP extension

Extensor Pollicis Brevis Innervation

Radial Nerve (Posterior Interosseus)