The iliocostalis cervicis is a muscle located in the neck region, part of the larger group known as the erector spinae. It plays a crucial role in supporting and stabilizing the cervical spine, which consists of the upper vertebrae in the neck. This muscle helps in extending and laterally flexing the neck. Originating from the upper ribs, the iliocostalis cervicis attaches to the transverse processes of the cervical vertebrae. It works in conjunction with other muscles in the spinal column to facilitate movements such as bending and rotating the neck, contributing to overall neck mobility and posture.