Muscles of the Forearm and Elbow

Question 1

Biceps Brachii

Answer 1

Origin: Short head- coracoid process; long head- supraglenoid tubercle of scapula
Insertion: Tuberosity of radius
Action: Flexion at elbow and shoulder; supination
Innervation: Musclocutaneous nerve

Question 2

Brachialis

Answer 2

Origin: Anterior/distal surface of humerus
Insertion: Tuberosity of ulna
Action: Flexion at elbow
Innervation: Musculocutaneous nerve and radial nerve

Question 3

Brachioradialis

Answer 3

Origin: Lateral epicondyle of humerus
Insertion: Lateral aspect of styloid process of radius
Action: Flexion at elbow
Innervation: Radial nerve

Question 4

Triceps

Answer 4

(Long head, lateral head, medial head)
Origin: Lateral head - superior, lateral margin on humerus. Long head - Infraglenoid tubercle of scapula. Medial head - Posterior surface of humerus
Insertion: Olecranon of ulna
Action: Extension at elbow
Innervation: Radial nerve

Question 5

Pronator Teres

Answer 5

Origin: Medial epicondyle of humerus
Insertion: Mid-lateral surface of radius
Action: Pronation
Innervation: Median nerve

Question 6

Supinator

Answer 6

Origin: Lateral epicondyle of humerus
Insertion: Anterolateral surface of humerus
Action: Supination
Innervation: Deep Radial Nerve