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.

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 arms in different directions.

The Deltoid muscle is a large triangular-shaped muscle that lies over the glenohumeral joint and which gives the shoulder its rounded contour. It is comprised of three distinct portions (anterior or …

Sep 23, 2025 · The deltoid muscle is one of the main abductors of the shoulder, meaning it helps lift the arm when reaching for objects or brushing the hair. It’s also activated when carrying heavy weights, …

Jan 31, 2026 · The deltoid muscle is the main muscle of the shoulder. It helps to lift the arm up and rotate the shoulder.

Jan 30, 2026 · The deltoid muscle is a rounded, triangular muscle located on the uppermost part of the arm and the top of the shoulder. It is named after the Greek letter delta, which is shaped like an …

The deltoid muscle is impacted by common injuries and clinical procedures. This study aims to summarize the anatomy, injuries, and clinical considerations involving the deltoid muscle.

The deltoid is a triangular shoulder muscle responsible for arm rotation, lifting, and overall shoulder stability.

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).