The deltoid muscle (or musculus deltoideus) is the muscle [1] forming the rounded contour of the human shoulder. It is also known as the 'common shoulder muscle', particularly in other animals such as the …

Apr 23, 2024 · The deltoid is a large, thick triangular skeletal muscle in the shoulder joint, connecting the arm to the body trunk. Its name derives from ‘delta’ (Δ), the Greek letter that it resembles in shape. …

Sep 2, 2025 · The deltoid is a large muscle responsible for lifting the arm and giving the shoulder its range of motion. Pain in this area may be due to issues like overuse or injury.

Overview What are deltoid muscles? Your deltoid muscles are in your shoulder, which is the ball-and-socket joint that connects your arm to the trunk of your body. Deltoid muscles help you move your …

Oct 30, 2023 · Origin, insertion, innervation and functions of the deltoid muscle. The deltoid is a thick, triangular shoulder muscle. It gets its name because of its similar shape to the Greek letter ‘delta’ …

Sep 23, 2025 · What is the deltoid muscle? The deltoid muscle is a large, triangular-shaped muscle that lies superficially to other muscles of the shoulder and is responsible for forming the shoulder’s …

The Deltoid muscle is a large triangular-shaped muscle that lies over the glenohumeral joint and which gives the shoulder its rounded contour. Acts mainly as an abductor of the shoulder and stabiliser of …

Dec 14, 2023 · The deltoid muscle is the main muscle of the shoulder. A triangle-shaped muscle, it helps move your upper arm and stabilizes the shoulder joint. The deltoid connects to the clavicle …

Oct 9, 2022 · The deltoid is an intrinsic muscle of the shoulder region. It is shaped like an inverted triangle and can be divided into three parts (anterior, middle and posterior).

Understanding the Deltoid Muscle Anatomy The deltoid muscle, commonly called the “delts,” is a thick, triangular muscle that forms the rounded contour of the shoulder. It plays a crucial role in many …