It is attached to the Deltoid tuberosity
The primary muscle attached at the point of insertion is the muscle that undergoes the most movement when the muscle contracts. For example, in the bicep curl exercise, the bicep muscle is the primary muscle attached at its point of insertion on the radius bone in the forearm.
Deltoid Tuberosity
The deltoid is very interesting muscle. It arise from the outer and lateral border of the clavicle and outer and lateral border of the spine of the scapula. From the corresponding inner border, you have insertion of the trapezius muscle. The deltoid muscle is inserted on the deltoid tuberosity on the lateral and middle part of the humerus bone. So it looks that the trapezius muscle continue as the deltoid muscle.
deltoid tuberosity
Deltoid Tuberosity
Deltoid tuberosity, a little prominence found midway on the lateral surface of the humerus. Right?
Though usually described as a single insertion, the deltoid insertion is divided into two or three areas. Insertion is on the deltoid tuberosity on the middle of the lateral aspect of the shaft of the humerus
The major muscle that abducts the humerus is the Deltoid. (all muscles move in conjuction, there may be more muscles that contribute to the abduction of the humerus) pectoralis major and latissimus dorsi
The major muscle that abducts the humerus is the Deltoid. (all muscles move in conjuction, there may be more muscles that contribute to the abduction of the humerus) pectoralis major and latissimus dorsi
It is a raised section of the humerus where muscles connect, these muscles are generally used for rotating the arm.
the latissimus dorsi and the pectoralis major adduct the humerus
The deltoid muscle looks like a large "D" covering the shoulder. There are three parts to it: The anterior deltoid which is commonly called front delts, The lateral deltoids or side delts, and the posterior deltoid or rear delts. The anterior deltoid's (front delts') origin is the clavicle, the lateral's (side delts') origin is the acromion process of the scapula and the posterior's (rear delts') origin is the spine of the scapula. The insertion for all is the deltoid tuberosity on the humerus.