Arm Muscles

Question 1

Biceps brachii

Answer 1

O:
- coracoid process
- supraglenoid tubercle
I:
- radial tuberosity
- bicipital aponeurosis
N:
- musculocutaneous
A:
- flexion of forearm & SH
- supination

Question 2

coracobrachialis

Answer 2

O:
- coracoid process
I:
- middle of medial surface of humeral shaft
N:
- musculocutaneous
A:
- ADD
- Flex

Question 3

brachialis

Answer 3

O:
- distal 1/2 of anterior surface of humerus
I:
- coronoid process
- ulnar tuberosity
N:
- musculocutaneous
- radial
A:
- strong forearm flexion

Question 4

triceps brachii

Answer 4

O:
- infraglenoid tubercle
- posterior surface of inferior half of humerus
- posterior surface of superior half of humerus
I:
- olecranon
- fascia of forearm
N:
- radial
A:
- extension of forearm
- SH extension & ADD

Question 5

anconeus

Answer 5

O:
- lateral epicondyle of humerus
I:
- lateral surface of olecranon
N:
- radial
A:
- assists in forearm extension
- stabilize elbow joint