Muscles of Axillary Region

Question 1

Anconeus (attachments)

Answer 1

From lateral epicondyle of humerus to lateral surface of the olecranon process

Question 2

Anconeus (actions)

Answer 2

Extension of elbow

Question 3

Anconeus (innervation)

Answer 3

Radial nerve (C7-8)

Question 4

Biceps Brachii (attachments)

Answer 4

From coracoid process (short head) & supraglenoid tubercle (long head) of the scapula to the radial tuberosity & deep antebrachial fascia (through the bicipital aponeurosis)

Question 5

Biceps Brachii (actions)

Answer 5

Shoulder & elbow flexion, supination of forearm

Question 6

Biceps Brachii (innervation)

Answer 6

Musculocutaneous nerve (C5-6)

Question 7

Brachialis (attachments)

Answer 7

From the distal anterior shaft of the humerus, lateral & medial intermuscular septa to the coronoid process & ulnar tuberosity

Question 8

Brachialis (actions)

Answer 8

Elbow flexion

Question 9

Brachialis (innervation)

Answer 9

Musculocutaneous nerve & small branch from radial nerve (C5-6)

Question 10

Coracobrachialis (attachments)

Answer 10

From coracoid process to the proximal medial shaft of the humerus

Question 11

Coracobrachialis (actions)

Answer 11

Shoulder flexion & adduction

Question 12

Coracobrachialis (innervation)

Answer 12

Musculocutaneous nerve (C6-7)

Question 13

Triceps Brachii (attachments)

Answer 13

From infraglenoid tubercle of the scapula (long head), proximal posterolateral (lateral head), distal posteromedial (medial) shaft fo humerus to the olecranon process of ulna

Question 14

Triceps Brachii (actions)

Answer 14

Shoulder extension (long head), elbow extension (all 3 heads)

Question 15

Triceps Brachii (innervation)

Answer 15

Radial nerve (C6-T1)