The raising of the arm can be divided into three phase. The initial phase is carried out by the supraspinatus muscle. After the arm as been raised to 30 degrees, the deltoid muscle takes over. This muscle performs this action until the horizontal plane. In the last phase, the serratus anterior raises the arm above the horizontal plane.
So the answer to your question is the supraspinatus muscle, deltoid muscle, and the serratus anterior muscle.
The muscle that raises and rotates the arm is the deltoid muscle. It is a large, triangular muscle located in the shoulder that is responsible for various movements of the arm, including abduction (raising the arm) and rotation.
The biceps brachii muscle will contract, pulling the lower arm up.
To raise your hand in class, by bending your arm at the elbow.
Arm
The supraspinatus muscle is one of the key muscles involved in a lateral raise. It is responsible for initiating the movement by abducting the arm away from the body. It works in conjunction with other shoulder muscles to raise the arm to the side.
The muscle that adducts and raises the arm at the shoulder joint is primarily the pectoralis major. This muscle is located in the chest and is responsible for movements such as bringing the arm closer to the body and lifting it upward. Additionally, the latissimus dorsi also assists in adducting and raising the arm, especially during certain movements.
A muscle doesn't rotate the shoulder. The ligaments that connect your shoulder blade to your arm, to your rib cage all work in a ball and socket type of way allowing you to rotate your arm 360o.
There is not a single muscle that rotates the upper arm. The name of the muscle that contributes in rotation of the upper arm is deltoid muscle.
The brachialis is a muscle in the upper arm that flexes the elbow joint.
What are the tendon in your arm?
If you can't raise your left arm but it doesn't hurt, it may indicate a problem with muscle strength or nerve function rather than an injury. Conditions like nerve compression, muscle weakness, or even neurological issues could affect your ability to lift your arm. It's important to consult a healthcare professional for a proper diagnosis and treatment plan.
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