Elbow Anatomy

Question 1

Biceps Brachii

Answer 1

Origin: Short head:
Coracoid process of scapula
Long head:
Supraglenoid tubercle of scapula

Insertion: Tuberosity of the radius and
aponeurosis of biceps brachii

Action:

• Elbow flexion
• Forearm supination
• Shoulder flexion

Question 2

Triceps Brachii

Answer 2

Origin: Long head: infraglenoid tubercle of scapula
Lateral head: Posterior surface of proximal 1/2 of humerus
Medial head: Posterior surface of distal 1/2 of the humerus

Insertion: Olecranon process of the ulna

Action:
- Elbow extension
Long head:
- Shoulder extension
- Shoulder adduction

Question 3

Brachioradialis

Answer 3

Origin: Proximal 2/3 of lateral supracondylar ridge of humerus

Insertion: Styloid process of radius

Action:

• Elbow flexion
• Forearm pronation and supination when resisted

Question 4

Brachialis

Answer 4

Origin: Distal 1/2 of anterior surface of humerus

Insertion: Tuberosity and coronoid process of ulna

Action:
- Elbow flexion