The deltoid muscle
is triangular-shaped, and located in the upper side part of the shoulder
. This is an abductor muscle in the arm
: thanks to the deltoid muscle, it is possible to lift the arm away from the body
. But this is not its only function: the deltoid also participates in rotational movements, bending and extending, making it one of the most important and versatile arm muscles
. This is usually the muscle injected with most vaccines in adults (usually the thigh in children).
Original article published by
. Translated by Jeff