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 …

Sep 24, 2021 · 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 …

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 …

Jan 30, 2024 · This muscle forms the shoulder's rounded contour, being thick and spread out anteroposteriorly (see Image. Surface Anatomy of the Right Upper Extremity, Posterior Aspect). The …

Dec 12, 2024 · What Are the Deltoid Muscles? What is the deltoid muscle? Deltoids are also known as shoulder muscles. They’re a very important muscle group that’s located where your upper arm meets …

The deltoid, as it is commonly known, originates on the outer front third of the clavicle (collarbone) and the lower margin of the spine of the scapula (shoulder blade). Its fibres unite to form a thick tendon …

Discover the anatomy of the deltoid muscle, its origin, insertion, actions, innervation, and arterial supply, plus its clinical significance.

Oct 22, 2024 · Learn all about the anatomy of the deltoid muscle, its function and the best exercises for strengthening and stretching.

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.

Dec 31, 2025 · 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 …