What function does the semispinalis capitis have?

The semispinalis capitis is a muscle located in the posterior neck region that plays a crucial role in head and neck movements. Its primary functions include extending and rotating the head and neck, as well as stabilizing the cervical spine. This muscle contributes to posture and helps facilitate the movement of the upper spine during various activities. Additionally, it assists in proprioception, providing sensory feedback about head position.