Arm

Question 1

Name the 5 muscles of the arm

Answer 1

Triceps Brachii
Anconeus
Biceps brachii
Brachialis
Coracobrachialis

Question 2

What nerve innervates the triceps brachii?

Answer 2

Radial nerve

Question 3

What nerve innervates the anconeus?

Answer 3

Radial nerve (C5 - T1)

Question 4

What nerve innervates the biceps brachii?

Answer 4

Musculocutaneous nerve (C5, C6)

Question 5

What nerve innervates the brachialis?

Answer 5

Musculocutaneous nerve and radial nerve (C7)

Question 6

What nerve innervates the coracobrachialis?

Answer 6

Musculocutaneous nerve (C5, C6)

Question 7

What artery supplies the triceps brachii?

Answer 7

Branches of profundal brachii artery

Question 8

What artery supplies the anconeus?

Answer 8

Deep brachial

Question 9

What artery supplies the biceps brachii?

Answer 9

Muscular branch of brachial artery

Question 10

What artery supplies the brachialis?

Answer 10

Radial recurrent artery, muscular branches of brachial artery

Question 11

What artery supplies the coracobrachialis?

Answer 11

Muscular branches of brachial artery

Question 12

Triceps brachii

Answer 12

Extends forearm at elbow, long head stabilises head of abducted humerus and extends and adducts arm at shoulder

Question 13

Anconeus

Answer 13

Assists triceps in extending elbow, abducts ulna in pronation

Question 14

Biceps brachii

Answer 14

Flexes and supinates forearm at elbow

Question 15

Brachialis

Answer 15

Flexes forearm at elbow

Question 16

Coracobrachialis

Answer 16

Flexes and adducts arm at shoulder

Question 17

Insertion of triceps brachii

Answer 17

Long head - infraglenoud tubercle of scapula
Lateral head - upper half of posterior humerus
Medial head - distal 2/3 of medial and posterior humerus
TO
Posterior surface of olecranon process of ulna

Question 18

Insertion of anconeus

Answer 18

Posterior surface of lateral epicondyle of humerus to lateral surface of olecranon and posterior proximal ulna

Question 19

Insertion of biceps brachii

Answer 19

Long head - supraglenoud tubercle of scapula
Short head - tip of coracoid process of scapula
TO
Radial tuberosity, fascia of forearm via bicipital aponeurosis

Question 20

Insertion of brachialis

Answer 20

Distal half of anterior surface of humerus to coronoid process and tuberosity of ulna

Question 21

Insertion of coracobrachialis

Answer 21

Tip of coracoid process of scapula to middle third of medial surface of humerus