097 Innervations Of The Arm Muscles

Leslie Samuel discusses the innervation of arm muscles, focusing on the musculocutaneous and radial nerves. The musculocutaneous nerve innervates the flexor muscles, including the biceps brachii, brachialis, and coracobrachialis. The radial nerve innervates the extensor muscles, specifically the triceps. The video emphasizes the importance of understanding these nerves for muscle function and concludes with a brief review.

Which two nerves are primarily responsible for innervating the muscles in the arm?

• Ulnar and Median nerves

• Musculocutaneous and Radial nerves

• Radial and Median nerves

• Musculocutaneous and Ulnar nerves

What is the primary function of the biceps brachii muscle?

• Abduction of the arm

• Flexion of the forearm

• Rotation of the wrist

• Extension of the forearm

Which nerve innervates the biceps brachii, brachialis, and coracobrachialis muscles?

• Musculocutaneous nerve

• Ulnar nerve

• Radial nerve

• Median nerve

What is the main muscle group responsible for extending the arm at the elbow?

• Biceps brachii

• Coracobrachialis

• Triceps brachii

• Brachialis

Which nerve is responsible for innervating the triceps brachii muscle?

• Median nerve

• Ulnar nerve

• Radial nerve

• Musculocutaneous nerve