射箭肌肉三角肌

Side.

Front.

Back.

Animation.

Deltoid muscle.

  Anterior part of deltoid (arises from most of the anterior border and upper surface of the lateral third of the clavicle.)

  Lateral part of deltoid (arises from the superior surface of the acromion process.)

  Posterior part of deltoid (arises from the lower lip of the posterior border of the spine of the scapula.)