Muscles of the Forearm Quiz

Pronator Teres

• Origin: Medial epicondyle and coronoid process of ulna
• Insertion: Middle of lateral side of radius
• Nerve: Median nerve
• Action: Pronates and flexes forearm

Flexor Carpi Radialis

• Origin: Medial epicondyle of humerus
• Insertion: Bases of second and third metacarpals
• Nerve: Median nerve
• Action: Flexes forearm, flexes and abducts hand

Palmaris Longus

• Origin: Medial epicondyle of humerus
• Insertion: Flexor retinaculum, palmar aponeurosis
• Nerve: Median nerve
• Action: Flexes forearm and hand

Flexor Carpi Ulnaris

• Origin: Medial epicondyle (humeral head), medial olecranon, and posterior border of ulna (ulnar head)
• Insertion: Pisiform, hook of hamate, and base of fifth metacarpal
• Nerve: Ulnar nerve
• Action: Flexes forearm, flexes and adducts hand

Flexor Digitorum Superficialis

• Origin: Medial epicondyle, coronoid process, oblique line of radius
• Insertion: Middle phalanges of finger
• Nerve: Median nerve
• Action: Flexes proximal interphalangeal joints, flexes hand and forearm

Flexor Digitorum Profundus

• Origin: Anteromedial surface of ulna, interosseous membrane
• Insertion: Bases of distal phalanges of fingers
• Nerve: Ulnar and median nerve
• Action: Flexes distal interphalangeal joints and hand

Flexor Pollicis Longus

• Origin: Anterior surface of radius, interosseous membrane, and coronoid process
• Insertion: Base of distal phalanx of thumb
• Nerve: Median nerve
• Action: Flexes thumb

Pronator Quadratus

• Origin: Anterior surface of distal ulna
• Insertion: Anterior surface of distal radius
• Nerve: Median nerve
• Action: Pronates forearm