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Pectoralis Major Muscle is the largest and most superficial muscle of the human chest. Also known as the "chest muscle," it plays a significant role in arm movements (flexion, adduction, internal rotation). Anatomical Structure The Pectoralis Major Muscle is a thick, fan-shaped muscle located on the anterior thoracic wall. It consists of three main parts: the clavicular head, the sternocostal head, and the rarely present abdominal head. The clavicular head originates from the medial half of the

The Deltoid Muscle is a muscle that surrounds the shoulder and plays a key role in arm movements. It takes its name from the Greek word "delta" (Δ) due to its triangular shape. It is also referred to as the deltoideus in some anatomical references. It functions as the main abductor muscle (elevator muscle) of the arm and contributes to the stabilization of the shoulder joint. Anatomy Morphology The Deltoid Muscle is a large, triangular-shaped muscle consisting of three distinct anatomical divisi

The Omohyoid Muscle is a muscle located in the anterior neck that depresses the hyoid bone. Composed of two bellies (superior and inferior), this muscle serves as an anatomical landmark for defining the boundaries of the neck triangles. Anatomy Morphology and Connection Points The Omohyoid Muscle is a thin, long, and obliquely oriented muscle located between the infrahyoid muscles. It consists of two distinct parts: the superior and inferior belly. The inferior belly originates from the superior

The Levator Scapulae Muscle is a muscle located in the posterolateral region of the neck and is responsible for elevating the scapula. It lies beneath the trapezius muscle and plays an important role in shoulder stabilization. Anatomy Morphology and Connection Points The Levator Scapulae Muscle is a long, narrow muscle located in the posterolateral region of the neck. It helps elevate the scapula. It is located deep within the neck, beneath the trapezius and sternocleidomastoid muscles. This ana