Radial nerve

This tutorial covers the anatomy, innervation, and distribution of the radial nerve, which supplies muscles in the upper arm and forearm. It details the nerve's pathway, branching into deep and superficial branches, and the muscles it innervates, such as the brachioradialis and extensor carpi radialis. The video emphasizes the nerve's role in movements of the elbow, hand, and wrist. It concludes with a call to explore more resources on Kenhub for interactive learning.

What is the origin of the radial nerve?

• Posterior cord of the brachial plexus

• Lateral cord of the brachial plexus

• Anterior cord of the brachial plexus

• Medial cord of the brachial plexus

Which muscle does the deep branch of the radial nerve penetrate?

• Brachioradialis

• Supinator

• Triceps

• Brachialis

Before the radial nerve divides, which muscles receive innervation?

• Extensor carpi radialis brevis

• Supinator and triceps

• Flexor carpi ulnaris

• Brachioradialis and extensor carpi radialis longus

What is the primary function of the extensor carpi radialis longus and brevis?

• Flexion of the wrist

• Flexion of the fingers

• Extension and radial abduction of the wrist

• Pronation of the forearm

How do the extensor carpi radialis muscles contribute to a strong fist closure?

• By pronating the forearm

• By abducting the fingers

• By stretching the flexor muscles of the hand and fingers

• By flexing the wrist