Which muscle has the phrenic nerve on its anterior surface?
The phrenic nerve lies on the anterior surface of the anterior scalene muscle. The nerve is held tightly against the surface of the muscle by the deep cervical fascia The roots of the brachial plexus and the subclavian artery pass posterior to the anterior scalene muscle and anterior to the middle scalene muscle.
Sternocleidomastoid
Anterior digastric
Superior belly of the omohyoid
Anterior scalene