What is the insertion point of the deltoid muscle?

The deltoid muscle inserts at the deltoid tuberosity of the humerus. This is the site on the lateral aspect of the humerus where the muscle fibers converge and attach after originating from the clavicle and scapula. The deltoid is responsible for shoulder abduction, flexion, and extension, depending on which part of the muscle is activated.

The deltoid tuberosity provides a rough prominence on the humerus, which allows for a secure attachment of the muscle, facilitating strong and effective movement of the shoulder joint. The placement of the insertion is significant because it allows the deltoid to exert a powerful pull on the upper arm, essential for various arm movements and functions.