The semispinalis capitus is a deep muscle on the back of the neck. It originates from the |spine| (7th cervical down to the 6th or 7th thoracic vertebrae) and inserts into the elongated area at the base of the |skull|. It is a deep muscle that lies under the |trapezius|. Both the |trapezius| and the semispinalis capitus create the muscular column on the back of the neck. The semispinalis capitus muscle extends the head and rotates it so the face is directed to the opposite side.
