Elbow Joint

Question 1

Brachialis

Answer 1

O: Distal half of humerus, anterior surface
I: Coronoid process and ulnar tuberosity
A: Elbow flexion
N: Musculocutaneous n. C5, C6

Question 2

Biceps

Answer 2

O: LH: supraglenoid tubercle of scapula, SH:coracoid process of scapula
I:Radial tuberosity of radius
A:Elbow flexion, forarm supination
N: Musculocutaneous n. C5, C6

Question 3

Brachioradialis

Answer 3

O:Lateral supracondylar ridge on the humerus
I: Styloid process of the radius
A: Elbow flexion
N: Radial n. C5, C6

Question 4

Triceps

Answer 4

O: LH: infraglenoid tubercle of scapula, Lateral H: inferior to greater tubercle on posterior humerus, Medial H: posterior surface of humerus
I: Olecranon process of ulna
A: Elbow extension
N: Radial n. C6, C7, C8

Question 5

Anconeus

Answer 5

O:Lateral epicondyle of humerus
I:Lateral and inferior to olecranon process of ulna
A:Assists in elbow extension
N: Radial n. C6, C7, C8

Question 6

Pronator Teres

Answer 6

O:Medial epicondyle of humerus and coronoid process of ulna
I: Lateral aspect of radius a its midpoint
A:Forearm pronation, assistive in elbow flexion
N: Median n. C6, C7

Question 7

Pronator Quadratus

Answer 7

O: Distal one-fourth of ulna
I: Distal one-fourth of radius
A: Forearm pronation
N: Median n. C8, T1

Question 8

Supinator

Answer 8

O: Lateral epicondyle of humerus and adjacent ulna
I: Anterior surface of the proximal radius
A: Forearm supination
N: Radial n. C6