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What is the deltoid muscle called?
The deltoid muscle is the main muscle of the shoulder. It consists of three muscle heads: the anterior deltoid, lateral deltoid, and posterior deltoid.
Is the deltoid muscle named for its shape?
The names of some muscles reflect their shape. For example, the deltoid is a large, triangular-shaped muscle that covers the shoulder. It is so-named because the Greek letter delta is a triangle.
What does deltoid mean in muscles?
(Entry 1 of 2) : a large triangular muscle that covers the shoulder joint and serves to raise the arm laterally.
What are landmarks of the deltoid muscle?
The deltoid has three origins: the lateral end of the clavicle, the acromion of the scapula at the top of the shoulder, and the spine of the scapula.
What are the symptoms of a torn deltoid?
Common signs of a deltoid strain include:
- Muscle tightness, weakness, and soreness. A minor muscle injury can make your shoulder feel tight or ache for several days, even during rest.
- Limited range of movement. More serious muscle damage can interfere with normal movement.
- Swelling and bruising.
Where is the deltoid muscle located in the body?
Deltoid The deltoid muscle is located on the outer aspect of the shoulder and is recognized by its triangular shape. The deltoid muscle was named after the Greek letter Delta due to the similar shape they both share. The deltoid muscle is constructed with three main sets of fibers: anterior, middle, and posterior.
Which is a common anatomical variation of the deltoid?
A common anatomical variation of the deltoid includes the presence of separate fascial sheaths and muscle fibers on the posterior deltoid. This may cause medical professionals to mistake the separate muscle fibers of the posterior deltoid for an adjoining muscle, teres minor.
How does the acromial part of the deltoid muscle work?
Acromial part of the deltoid muscle fibres perform abduction of the shoulder joint, i.e. movement of the arm away from the midline of the body. Spinal parts of the deltoid muscle assist in extension and external rotation of the shoulder joints.
How does the anterior head of the deltoid work?
The anterior head of the deltoid works closely with pectoralis major, which allows for full stabilization near its more superior insertion on the clavicle. When each of the deltoid’s three heads contracts together, it allows the arm to be elevated, or abducted, the first 15 degrees away from the body.