Anterior muscles of the arm

Question 1

What innervates all 3 anterior muscles of the arm?

Answer 1

Musculocutaneous

Question 2

What is the arterial supply to the anterior compartment of the arm?

Answer 2

Muscular branches of brachial artery

Question 3

What is the pneumonic for the anterior muscles of the arm?

Answer 3

BBC

Biceps brachii
Brachialis
Coracobrachialis

Question 4

Describe the origin, insertion, innervation + action of biceps brachii

Answer 4

LONG HEAD = supraglenoid tubercle of scapula
SHORT HEAD = coracoid process
Radial tuberosity via biceps tendon + bicipital aponeurosis
Supinator, flexes arm @ elbow/shoulder joints

Question 5

Describe the origin, insertion, innervation + action of coracobrachialis

Answer 5

Coracoid process
Medial humeral shaft
Flexes arm @ shoulder, weak arm adductor

Question 6

Describe the origin, insertion, innervation + action of brachialis

Answer 6

Anterior distal humeral shaft
Coronoid process/ulnar tuberosity
Flexes forearm @ elbow