Deltoidmuskulatur

Deltoidmuskulatur refers to the deltoid muscle, a large, triangular muscle covering the glenohumeral joint of the shoulder. It is composed of three distinct parts: the anterior (clavicular) head, the lateral (acromial) head, and the posterior (spinal) head. These heads originate from the clavicle, acromion, and spine of the scapula, respectively, and all converge to insert on the deltoid tuberosity of the humerus. The deltoid is the primary mover of the arm and plays a crucial role in a variety of shoulder movements. The anterior head is primarily responsible for shoulder flexion and internal rotation. The lateral head is the main abductor of the arm, lifting it away from the body. The posterior head assists in shoulder extension and external rotation. Due to its prominent location and role in numerous activities, the deltoid muscle is susceptible to various injuries, including strains, tears, and inflammation, often resulting from overuse or direct trauma. It is also a common site for intramuscular injections due to its large size and vascularity.