Lab 4 Part 1

Question 1

Biceps Brachii

Answer 1

Long Head
O: supraglenoid tubercle of scapula

Short Head:
O: Coracoid Process

I: Radial tuberosity, aponeurosis to deep fascia of common flexor tendon
A: Elbow flexion, forearm supination
N: Musculocutaneous nerve

Question 2

Brachialis

Answer 2

O: Distal half of anterior shaft of humerus
I: Ulnar tuberosity of ulna, coronoid process
A: Elbow flexion
N: Musculocutaneous nerve

Question 3

Brachioradialis

Answer 3

O: Lateral supracondylar ridge of humerus
I: Lateral aspect of styloid process of radius
A: Elbow flexion, assists with pronation and supination
N: Radial nerve

Question 4

Triceps Brachii

Answer 4

Long Head:
O: Infraglenoid tubercle of scapular
Lateral Head:
O: Proximal 1/3 of posterolateral humerus
Medial Head:
O: Distal 2/3 of posteromedial humerus

I: Olecranon process of ulna
A: Elbow extension. Long head also GH extension
N: Radial n.

Question 5

Pronator Teres

Answer 5

Humeral Head
O: Common flexor tendon, Medial epicondyle, medial supracondylar ridge of humerus
Ulnar Head
O: Medial side of coronoid process

I: Middle 1/3 of lateral radius
A: pronation of forearm, assists with elbow flexion
N: Median nerve

Question 6

Pronator Quadratus

Answer 6

O: Distal 1/4 of anterior ulna
I: Distal 1/4 of anterior radius
A: pronation of forearm
N: Median nerve

Question 7

Supinator

Answer 7

O: Lateral epicondyle of humerus, supinator fossa, crest of ulna
I: Proximal 1/3 of anterior, lateral and posterior radius
A: supination of forearm
N: Radial n