The Longissimus Cervicis is a muscle located in the neck region, part of the larger erector spinae group. It plays a crucial role in extending and rotating the cervical spine, contributing to head and neck movements. This muscle connects the upper thoracic vertebrae to the cervical vertebrae. Functionally, the Longissimus Cervicis helps maintain posture and stability of the neck. It works in conjunction with other muscles, such as the Longissimus Thoracis and Longissimus Capitis, to support the spine during various activities, including lifting and turning the head.