Deltoid muscle
Deltoid Muscle
The Deltoid Muscle (pronounced: DEL-toyd MUH-suhl) is a large, triangular muscle occupying the upper arm and the shoulder giving it this rounded shape. The term "deltoid" comes from the Greek letter Delta, which is shaped like an equilateral triangle.
Anatomy
The deltoid muscle is divided into three parts: the anterior or clavicular part, the middle or acromial part, and the posterior or spinal part. Each part has its own distinct function and is named according to where it attaches to the scapula.
- The anterior deltoid raises the arm to the front.
- The middle deltoid raises the arm to the side.
- The posterior deltoid raises the arm to the rear.
Function
The primary function of the deltoid muscle is to prevent dislocation of the humerus when carrying heavy loads. It also plays a major role in arm and shoulder movements, including flexion, extension, and rotation.
Related Terms
- Rotator cuff: A group of muscles and tendons that stabilize the shoulder.
- Trapezius muscle: A large muscle at the back of the neck and upper spine.
- Biceps brachii: A muscle located in the upper arm that allows for flexion and rotation of the forearm.
See Also
External links
- Medical encyclopedia article on Deltoid muscle
- Wikipedia's article - Deltoid muscle
This WikiMD dictionary article is a stub. You can help make it a full article.
Languages: - East Asian
中文,
日本,
한국어,
South Asian
हिन्दी,
Urdu,
বাংলা,
తెలుగు,
தமிழ்,
ಕನ್ನಡ,
Southeast Asian
Indonesian,
Vietnamese,
Thai,
မြန်မာဘာသာ,
European
español,
Deutsch,
français,
русский,
português do Brasil,
Italian,
polski