Chapter 3

Question 1

Brachialis

Answer 1

O: anterior aspect of the humeral shaft 
I: coronoid process of ulna 
A: flexion of forearm 
N: musculocutaneous nerve 
*deep to the biceps brachii

Question 2

Brachioradialis

Answer 2

O: lateral supra condylar ridge of the humerus
I: styloid process of the radius
A:flex elbow (shake hands) assist supination/pronation
N: radial nerve

Question 3

Triceps brachii (3 origin)

Answer 3

Long head- infraglenoid tubercle of scap
Lateral head- posterior aspect of the shaft of the humerus (prox)
Medial head- posterior aspect of the shaft of humerus (distal)

Question 4

Anconeus

Answer 4

O: lateral epicondyle of the humerus
I: olecranon process of the ulna
A: extension of the elbow
N: radial nerve

Question 5

Pronator teres (o/I)

Answer 5

O: humeral head-medial epicondyle of humerus(common flexor tendon) ulnar head-coronoid process of ulna
I: lateral aspect of the shaft of radius

Question 6

Pronator teres (a/n)

Answer 6

A: pronates the forearm and flexes elbow-assists in flexion of the elbow
N:median nerve

Question 7

Pronator quadratus

Answer 7

O:distal 1/4 of ulna
I:distal 1/4 of radius
A:pronation of the forearm
N: median nerve

Question 8

Supinator

Answer 8

O: lateral epicondyle of the humerus and proximal ulna
I:proximal anterior radius
A:supination of forearm
N:radial nerve

Question 9

Biceps brachii

Answer 9

O: long head-supraglenoid tubercle of the scap 
Short head-Corocoid process of scap
I: radial tuberosity 
A:shoulder-flexes arm 
Elbow-flex & assist in supination 
N: musculocutaneous nerve