Musculus brachialis

The video tutorial provides an in-depth look at the brachialis muscle, a key muscle in the upper arm. It explains the muscle's location, often hidden by the biceps, and its contribution to the arm's contour. The origin of the brachialis is at the anterior surface of the distal humerus, and it attaches to the ulnacular tuberosity. The muscle is primarily innervated by the musculocutaneous nerve, with some individuals also receiving innervation from the radial nerve. The brachialis is the strongest flexor of the elbow joint, surpassing the biceps due to its proximity to the joint and single articulation. Additionally, it plays a role in maintaining joint capsule tension during flexion.

What is unique about the innervation of the brachialis muscle?

Explain the relationship between the brachialis muscle and the elbow joint.