Deltoid Muscle Origin. The tendinous attachment and the direct attachment of the muscle fibers. It enters onto the humerus and passes inferiorly around the glenohumeral joint on all sides.
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The deltoid muscle was named after the Greek letter Delta due to the similar shape they both share. Musculus deltoideus is a thick triangular-shaped muscle of the upper limb. 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.
Deltoid Muscle Origin and Insertion.
The lateral deltoid has acromial muscle fibers because it connects to the acromion process part of the shoulder blade. In the specimens studied a hypothetical acromioplasty of 4 mm would release on average 41 of the direct fiber attachment and a 6-mm acromioplasty would release 69 for. Its name derives from the Greek letter delta as the muscle resembles its shape. The deltoid muscle attaches to the anterior and lateral acromion primarily by direct tendinous attachment.
