Elbow joint. Muscles and nerves

This tutorial covers the anatomy and function of the brachial muscles, including the biceps brachii, coracobrachialis, brachialis, and triceps brachii. It explains the actions and innervations of these muscles, focusing on their roles in elbow flexion and extension. The biceps brachii is highlighted for its role in supination, while the triceps brachii is noted for elbow extension. The tutorial also discusses the musculocutaneous and radial nerves, emphasizing their pathways and potential risks in case of fractures.

Which nerve innervates the anterior brachial muscles?

• Musculocutaneous nerve

• Ulnar nerve

• Median nerve

• Radial nerve

What is the primary action of the biceps brachii muscle?

• Wrist flexion

• Elbow flexion

• Elbow extension

• Shoulder abduction

Where does the long head of the biceps brachii originate?

• Olecranon process

• Supraglenoid tubercle

• Infraglenoid tubercle

• Coracoid process

What is the function of the coracobrachialis muscle?

• Elbow extension

• Adduction of the humerus

• Wrist flexion

• Shoulder abduction

Which muscle is primarily responsible for elbow flexion besides the biceps brachii?

• Triceps brachii

• Brachialis

• Deltoid

• Coracobrachialis

What is the main function of the triceps brachii muscle?

• Wrist flexion

• Elbow extension

• Shoulder abduction

• Elbow flexion

Which nerve is at risk of damage in a mid-humeral fracture?

• Ulnar nerve

• Median nerve

• Radial nerve

• Musculocutaneous nerve