The Arm

Question 1

What are the muscles in the flexor compartment of the arm?

Answer 1

1. Biceps brachii
2. Brachialis
3. Coracobrachialis

Question 2

What are the origins and insertions of the Biceps brachii

Answer 2

ORIGINS=
Long head- supraglenoid tubercle 
Short head- coracoid process 
INSERTIONS=
radial tuberosity via the bicipital aponeurosis

Question 3

What are the 3 functions of the Biceps brachii?

Answer 3

1. Supination of the forearm
2. Flexion at the elbow
3. Flexion at the shoulder

Question 4

What is the origin and insertion of the Brachialis?

Answer 4

ORIGIN=
medial and lateral surface of the humeral shaft
INSERTIONS=
ulna tuberosity

Question 5

What is the function of the Brachiais?

Answer 5

Flexion at the elbow

Question 6

What is the origin and insertion of the Coracobrachialis?

Answer 6

ORIGIN=
Coracoid process
INSERTIONS=
Medial side of the humeral shaft

Question 7

What is the function of the Coracobrachialis?

Answer 7

Flexion at the shoulder and week adduction

Question 8

What are the muscles in the extensor compartment of the arm?

Answer 8

Triceps brachii

Question 9

What are the origins and insertions of the triceps brachii?

Answer 9

ORIGINS=
Long head- infraglenoid tubercle
Lateral head- humerus, superior to the radial groove
Medial head- humerus, inferior to the radial groove
INSERTIONS=
head converge into one tendon- olecranon of the ulna

Question 10

What is the function of the triceps brachii?

Answer 10

Extension of the arm at the elbow

Question 11

What nerve supplies the flexor compartment?

Answer 11

Musculocutaneous nerve

Question 12

What nerve supplies the extensor compartment?

Answer 12

Radial nerve

Question 13

What is the medial and lateral border of the cubital fossa?

Answer 13

Medial border- lateral border of the Pronator teres

Lateral border- medial border of the brachioradialis

Question 14

What is the contents of the cubital fossa?

Answer 14

1. Radial nerve
2. Brachial artery
3. Median nerve
4. Biceps tendon