Elbow

Question 1

Brachioradialis

Answer 1

Origin: lateral supracondylar ridge of humerus and intermusclar septum

Insertion: styloid process of radius

Innervation: radial nerve (C5, C6)

Function: accessory flexor of the elbow when the forearm is midpronated

Question 2

Anconeus

Answer 2

Origin: lateral supracondylar ridge of the humerus

Insertion: olecron of the ulna

Innervation: radial nerve (C6, C7, C8)

Function: accessory extensor

Question 3

Pronator teres

Answer 3

Origin: medial epicondyle of the humerus and coronoid process of the ulna

Insertion: lateral radius

Innervation: median nerve (C6, C7

Function: pronation

Question 4

Flexor carpi radialis

Answer 4

Origin: medial epicondyle of the humerus

Insertion: base of metacarpals II and III

Innervation: median nerve (C6, C7)

Function: flexes and radially deviates the wrist

Question 5

Palmaris Longus

Answer 5

Origin: medial epicondyle of the humerus

Insertion: palmar aponeurosis

Innervation: median nerve (C7, C8)

Function: flexes wrist joint

Question 6

Flexor carpi ulnaris

Answer 6

Origin: medial epicondyle of the humerus and olecranon of the ulna

Insertion: pisiform, hook of hamate, and base of metacarpal V

Innervation: ulnar nerve (C7, C8, and T1)

Function: flexes and ulnarly deviates the wrist

Question 7

Flexor digitorum superficialis

Answer 7

Origin: medial epicondyle of the humerus and coronoid process of ulna; radius

Insertion: side of middle phalanges of 2nd-5th digits

Innervation: median nerve (C8, T1)

Function: flexes IP joints and MCP joints of digits 2-5; flexes wrist

Question 8

Flexor digitorum profundus

Answer 8

Origin: ulna and inteosseous membrane

Insertion: distal phalanges of 2nd-5th digits (palmar surface)

Innervation: lateral half by median nerve; medial half by ulnar nerve (C8, T1)

Function: flexes DIP and MCP joints of digits 2-5; flexes the wrist

Question 9

Flexor pollicis Longus

Answer 9

Origin: radius and interosseous membrane

Insertion: distal phalanx of thumb (palmar surface)

Innervation: median nerve (C7, C8)

Function: flexes IP joint and MCP joint of thumb

Question 10

Pronator quadratus

Answer 10

Origin: distal quarter of the ulna

Insertion: distal radius, anterior surface

Innervation: median nerve (C7, C8)

Function: pronation

Question 11

Extensor carpi radialis Longus

Answer 11

Origin: lateral supracondylar ridge of the humerus and intermuscular septum

Insertion: base of metacarpal II

Innervation: radial nerve (C6, C7)

Function: extends and radially deviates the wrist

Question 12

Extensor carpi radialis brevis

Answer 12

Origin: lateral epicondyle of the humerus and intermuscular septum

Insertion: base of metacarpals II and III

Innervation: deep branch of radial nerve (C7, C8)

Function: extends and radially deviates the wrist

Question 13

Extensor digitorum

Answer 13

Origin: lateral epicondyle of the humerus and intermuscular septum

Insertion: dorsal digital expansion of 2nd-5th digits

Innervation: posterior interosseus nerve (C7, C8)

Function: extends digits 2-5; extends wrist

Question 14

Extensor digiti minimi

Answer 14

Origin: lateral epicondyle of the humerus and intermuscular septum

Insertion: extensor hood of the 5th digit

Innervation: posterior interosseous nerve (C7, C8)

Function: extends the 5th digit

Question 15

Extensor carpi ulnaris

Answer 15

Origin: lateral epicondyle of the humerus and posterior border of ulna

Insertion: base of metacarpal V

Innervation: posterior interosseous nerve (C7, C8)

Function: extends and ulnarly deviates the wrist

Question 16

Supinator

Answer 16

Origin: lateral epicondyle of the humerus, radial collateral and anular ligaments; ulna

Insertion: radius

Innervation: posterior interosseous nerve (C6, C7)

Function: supination

Question 17

Extensor indicis

Answer 17

Origin: posterior ulna and interosseous membrane

Insertion: extensor hood of index finger

Innervation: posterior interosseous nerve (C7, C8)

Function: extends digit 2