The video tutorial explains the innervation of the extensor muscles in the posterior compartment of the forearm, focusing on the radial nerve and its branches. It introduces the rule of 222, which helps in understanding the innervation pattern of muscles before and after the elbow joint. The radial nerve bifurcates into a superficial sensory branch and a deep motor branch, which further becomes the posterior interosseous nerve. The tutorial details the muscles innervated by each branch, emphasizing the importance of understanding the radial nerve's pathway.

What is the primary nerve that innervates the muscles in the posterior compartment of the forearm?

Describe the journey of the radial nerve from its origin to its bifurcation.

How does the deep radial nerve differ from the superficial radial nerve in terms of function?

Explain the significance of the 'rule of 222' in relation to the radial nerve.

What are the two muscles innervated by the radial nerve before the elbow joint?

What happens to the deep radial nerve as it exits the supinator tunnel?

List the muscles innervated by the posterior interosseous nerve.