Arm

Question 1

Anterior compartment

Answer 1

Muscles:
Biceps brachii
Brachialis
Coracobrachialis
Nerve- musculucutaneous
Artery- brachial

Question 2

Biceps brachii

Answer 2

O- supraglenoid tubercle(long head), coracoid process(short head)
I- by tendon to radial tuberosity and bicipital aponeurosis to fascia
N- musculocutaneous
A- flexion of elbow and supination of flexed elbow

Question 3

Brachialis

Answer 3

O- lower half of humerus
I- coronoid process of ulna and ulnar tuberosity
N- musculocutaneous , lateral fibers receive fibers from radial nerve
A- main flexor of elbow

Question 4

Coracobrachialis

Answer 4

O- coracoid process
I- middle of medial border of humerus
N- musculocutaneous
A- flexion of shoulder joint

Question 5

Musculocutaneous nerve

Answer 5

O- lateral chord of BP
Termination - lateral cutaneous nerve of forearm
Landmarks- pierces Coracobrachialis, passes between biceps and Brachialis
Roots- C5,6,7

Question 6

Triceps muscle

Answer 6

Long head- arises from infraglenoid tubercle of scapula
Lateral head- posterior surface of humerus above spiral groove
Medial head- posterior surface of humerus, below spiral groove
Insertion- olecranon process of ulna
Nerve- radial nerve
Action- extension of elbow joint