Muscles of the Elbow & Radioulnar Joints

Question 1

Biceps Brachii

Answer 1

Origin

• LH: Supraglenoid Tubercle
• SH: Coracoid Process

Insertion
- Radial Tuberosity

Actions

• Flexion (A)
• Supination

Question 2

Brachialis

Answer 2

Origin
- Shaft of humerus

Insertion
- Coronoid process

Actions
- Flexion (A)

Question 3

Brachioradialis

Answer 3

Origin
- Shaft of Humerus

Insertion
- Styloid Process of Radius

Actions
- Flexion

Question 4

Triceps Brachii

Answer 4

Origin

• LH: Infraglenoid Cavity
• Medial and Lateral Humerus: Shaft of Humerus

Insertion
- Olecranon Process

Actions
- Extension (A)

Question 5

Anconeus

Answer 5

Origin
- Lateral epicondyle of humerus

Insertion
- Olecranon process

Actions
- Extension

Question 6

Supinator

Answer 6

Origin
- Lateral epicondyle of humerus

Insertion
- Shaft of radius

Actions
- Supination (A)

Question 7

Pronator Teres

Answer 7

Origin
- Medial Epicondyle of Humerus

Insertion
- Shaft of Radius

Actions

• Flexion
• Pronation

Question 8

Pronator Quadratus

Answer 8

Origin
- Shaft of Ulna

Insertion
- Shaft of Radius

Actions
- Pronation (A)