Final answer:
The three motions required for a full closing movement in the cervical spine are flexion, extension, and lateral flexion. These movements allow for forward bending, backward movement, and side bending of the neck, respectively.
Step-by-step explanation:
The cervical spine (C-spine) movements that lead to full closure or full range of motion include flexion, extension, and lateral flexion. These motions allow the neck to move in various directions: flexion is the anterior bending of the neck, extension is the posterior movement straightening from a flexed position or bending backward, and lateral flexion is the bending of the neck to the side.
While rotation involves the twisting of the neck side to side as when shaking the head "no," it is not a closing motion but one of turning. Therefore, the three motions for the full closing in the cervical spine are the aforementioned flexion, extension, and lateral flexion.
The three motions for full closing in the cervical spine are flexion, extension, and lateral flexion.