Upper Arm Muscles

Question 1

Biceps brachii

Answer 1

O: Long head: supraglenoid tubercle, tendon passes through Bicipital groove and shoulder joint activity. Short head: coracoid process

I: Radial tuberosity, Bicipital aponeurosis

A: Flex and supinate forearm (puts in corkscrew and pulls it out if you are right handed)

N: Musculocutaneous

Question 2

Brachialis

Answer 2

O: Lower ½ of humerus

I: Coronoid process (ulna)

A: Flex forearm

N: Musculocutaneous and radial

Question 3

Coracobrachialis

Answer 3

O: Coracoid process

I: Middle 1/3 humerus

A: Flex and adduct arm

N: Musculocutaneous

Question 4

Triceps

Answer 4

O: Long head: infraglenoid tubercle

Lateral head: posterior humerus (superior/lateral to radial groove)

Medial head: posterior humerus (inferior/medial to radial groove)

I: Olecranon process of ulna

A: Extend arm and forearm

N: Radial nerve