Muscles of the Arm

Question 1

Biceps Brachii (SHORT HEAD)

Answer 1

O: tip of corcoid process of scapula

I: radial tuberosity and bicipital aponeruosis into fascia of forearm

A: flexion and supination of forearm, flexion of arm

In: musculocutaneous nerve

Question 2

Biceps Brachii (LONG HEAD)

Answer 2

O: supraglenoid tubercle of scapula

I: radial tuberosity and bicipital aponeruosis into fascia of forearm

A: flexion and supination of forearm, flexion of arm

In: musculocutaneous nerve

Question 3

Coracobrachialis

Answer 3

O: coracoid process of scapula

I: anteromedial surface of the midshaft of the humerus

A: flexion and adduction of the arm

In: musculocutaneous nerve

Question 4

Brachialis

Answer 4

O: lower half of anterior surface of humerus + intermuscular septa

I: ulnar tuberosity

A: flexion of forearm

In: musculocutaneous nerve

Question 5

Triceps Brachii (LONG HEAD)

Answer 5

O: infraglenoid tubercle of the scapula

I: proximal end of olecranon of ulna

A: extension of forearm + extension of arm

In: radial nerve

Question 6

Triceps Brachii (LATERAL HEAD)

Answer 6

O: posterior surface of humerus above and lateral to the groove of the radial nerve and lateral septum

I: proximal end of olecranon of ulna

A: extension of forearm

In: radial nerve

Question 7

Triceps Brachii (MEDIAL HEAD)

Answer 7

O: posterior surface of humerus below and medial to the groove of the radial nerve and lateral septum

I: proximal end of olecranon of ulna

A: extension of forearm

In: radial nerve

Question 8

Anconeus

Answer 8

O: lateral epicondyle of humerus

I: lateral side of the olecranon on the ulna

A: extension of the forearm

In: radial nerve