muscles of the upper arm

Question 1

what are the anterior muscles of the upper arm?

Answer 1

1. biceps brachii
2. brachialis
3. coracobrachialis

Question 2

1. what is the origin of biceps brachii?
2. what is the insertion of biceps brachii?
3. what is the action of biceps brachii?
4. what is the innervation of biceps brachii?

Answer 2

1. LH = supraglenoid tubercle + SH = coracoid process
2. radial tuberosity
3. arm flexion, shoulder flexion + supination
4. musculocutaneous nerve

Question 3

1. what is the origin of brachialis?
2. what is the insertion of brachialis?
3. what is the action of brachialis?
4. what is the innervation of brachialis?

Answer 3

1. humerus
2. ulnar tuberosity
3. ellbow flexion
4. musculocutaneous nerve

Question 4

1. what is the origin of coracobrachialis?
2. what is the insertion of coracobrachialis?
3. what is the action of coracobrachialis?
4. what is the innervation of coracobrachialis?

Answer 4

1. coracoid process
2. humerus
3. elbow flexion + weak adduction
4. musculocutaneous nerve

Question 5

what are the posterior muscles of the upper arm?

Answer 5

• tricep brachii