Anterior scalene

  • The anterior scalene (also anterior scalene muscle, latin: musculus scalenus anterior) is a deep muscle of the lateral part of the neck that lies behind the sternocleidomastoid.

    Origin

    The anterior scalene originates from the anterior tubercles of the transverse processes of the 3rd to 6th cervical vertebrae (C3 - C6).

    Insertion

    The insertion site of the anterior scalene is the scalene tubercle on the inner border of the first rib.

    Action

    By contracting on both sides the anterior scalene flexes the neck forward. By contracting on one side it bends the neck laterally.

    Innervation

    The anterior scalene is innervated by the anterior rami of the 4th to 7th cervical spinal nerves (C4 - C7).