Unit 2 - Upper Limb: Anterior Arm Muscles (Ex. II)

Question 1

short head of biceps brachii

Answer 1

O: coracoid process of scapula
I: radial tuberosity
Inn: musculocutaneous N (C5-C6)
A: elbow flexion and supination; shoulder flexion; stabilization of humeral head during deltoid contraction; abduction and internal (M) rotation of humerus

Question 2

long head of biceps brachii

Answer 2

O: supraglenoid tubercle of scapula
I: radial tuberosity
Inn: musculocutaneous N (C5-C6)
A: elbow flexion and supination; shoulder flexion; stabilization of humeral head during deltoid contraction; abduction and internal (M) rotation of humerus

Question 3

brachialis

Answer 3

O: distal 1/2 of A surface of humerus
I: ulnar tuberosity
Inn: musculocutaneous N (C5-C6)
A: flexion @ elbow joint