Where does the deltoid attach?
Thereof, where does deltoid muscle attach?
The deltoid muscle originates from the lateral part of the clavicle (collarbone), as well as the spine and acromion process of the scapula (shoulder blade). From these points of origin, the muscle then travels down the arm and inserts on the deltoid tuberosity of the humerus (long bone of the upper arm).
Also, what are the actions of the three heads of the deltoid? The anterior deltoid also works in tandem with the subscapularis, pecs and lats to internally (medially) rotate the humerus. The lateral fibers perform basic shoulder abduction when the shoulder is internally rotated, and perform shoulder transverse abduction when the shoulder is externally rotated.
In this regard, where does the deltoid attach to the humerus?
In human anatomy, the deltoid tuberosity is a rough, triangular area on the anterolateral (front-side) surface of the middle of the humerus to which the deltoid muscle attaches.
What muscle attaches to the deltoid tuberosity?
Muscles. Middle and inferior fibres of trapezius muscle, and deltoid muscle, attached to the deltoid tubercle. The deltoid tubercle marks the beginning of attachment of deltoid muscle.