Muscles of the Arm

Question 1

Triceps Brachii

Answer 1

O: Long head - scapula
Medial head - humerus
Short head - humerus

I: Olecranon of ulna

A: Elbow extension

I: Radial

Question 2

Biceps Brachii

Answer 2

O: Long head - Tubercle of scapula
Short head - Coracoid process of scapula

I: Radial tuberosity

A: Elbow flexion and supination

N: Musculocutaneous

Question 3

Brachialis

Answer 3

O: Humerus

I: Ulnar tuberosity

A: Elbow flexion

N: Musculocutaneous

Question 4

Coracobrachialis

Answer 4

O: Coracoid process

I: Anterior, proximal humerus

A: Flexes and adducts arm

N: Musculocutaenous

Question 5

Brachioradialis

Answer 5

O: Distal, posterior humerus

I: Styloid process of the radius

A: Elbow flexion and pronation

N: Radial

Question 6

Extensor Digitorum

Answer 6

O: Lateral epicondyle of humerus

I: 2-5th digits

A: Wrist extension and extension/abduction of the fingers

N: Radial

Question 7

Extensor carpi ulnaris

Answer 7

O: Ulnar head

I: 5th metacarpal

A: Wrist extension and adduction of hand

N: Radial

Question 8

Extensor carpi radialis longis

Answer 8

O: Distal, posterior humerus

I: 2nd metacarpal

A: Elbow flexion, wrist extension and abduction

N: Radial

Question 9

Flexor Carpi Radialis

Answer 9

O: Medial epicondyle of humerus

I: 2nd metacarpal

A: Wrist flexion and abduction of the hand

N: Median

Question 10

Flexor Carpi Ulnaris

Answer 10

O: Medial epicondyle of humerus

I: Lateral carpal bones

A: Wrist flexion and adduction of hand

N: Ulnar

Question 11

Flexor Digitorum

Answer 11

O: Proximal, medial ulna and interosseous membrane

I: Palmar surface of hand, base of distal phalanges

A: Hand and phalanx flexion

N: Median