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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.

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12y ago
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14y ago

Primarily the deltoids, however the trapesius', biceps and triceps all play minor roles depending on whether the movement of the arm is abduction, flexion or extension, and also the plane in which it was raised.

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14y ago

Triceps, deltoids, biceps, I know all this

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9y ago

Bicep muscles on the front of the upper arm

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15y ago

lateral deltoid

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14y ago

They are pushed by tendons.

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Q: What is the muscle when you raise your arm?
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