Pronators and Supinators

Question 1

Pronator Teres

• Origin:
• Insertion:

Answer 1

Origin:

• Humeral head: Medial epicondyle
• Ulnar head: Coronoid process of ulna

Insertion:

• Middle lateral radius

Question 2

Pronator Teres

Action:

Innervation:

Answer 2

Action:

• Pronation
• Elbow flexion

Innervation:

• Median n.

Question 3

Pronator Quadratus

Origin

Insertion

Answer 3

Origin:

• Distal Ulna

Insertion:

• Distal Radius

Question 4

Pronator Quadratus

Action

Innervation

Answer 4

Action:

• Pronation

Innervation:

• Median n. (anterior interosseous n.)

Question 5

Brachioradialis

Origin

Insertion

Answer 5

Origin:

• Lateral supracondylar ridge

Insertion:

• Radial Styloid Process

Question 6

Brachioradialis

Action

Innervation

Answer 6

Action:

• Elbow flexion
• Pronation
• Supination

Innervation:

• Radial n.

Question 7

Supinator

Origin

Insertion

Answer 7

Origin:

• Humeral head: Lateral epicondyle
• Ulnar head: supinator crest

Insertion:

• Proximal lateral radius

Question 8

Supinator

Action

Innervation

Answer 8

Action:

• Supination

Innervation:

• Deep radial n.

Question 9

Biceps Brachii

Origin

Insertion

Answer 9

Origin:

• Short head: coracoid process
• Long head: supraglenoid tubercle

Insertion:

• Radial tuberosity (stronger one)
• Bicipital aponeurosis (weaker one)

Question 10

Biceps Brachii

Action

Innervation

Answer 10

Action:

• Arm flexion
• Forearm supination

Innervation:

• Musculocut. n.