No, it is the shoulder muscle.
The deltoid, located on the upper arm.
Deltoid
The middle fibers of the deltoid abduct the arm.
The middle fibers of the deltoid abduct the arm.
It is a triangular muscle covering the shoulder joint, it raises the arm from the side of the body
abducts the arm
The deltoid covers the shoulder. This triangular-shaped muscle lifts the arm or turns it.
Abduction of the arm.
Deltoid (delta = triangle + -oid = looks like/resembles) The deltoid muscle is a triangular shaped muscle of the upper arm. It is also known as the common shoulder muscle.
The deltoid muscle is located in the upper arm, covering the shoulder joint. It is commonly referred to as the deltoid and is responsible for arm abduction and rotation.
The main muscles in the arm are the biceps, triceps, deltoid, and brachialis.
The deltoid abducting the arm is an example of a third-class lever, where the effort (muscle force) is applied between the fulcrum (shoulder joint) and the resistance (weight of the arm).