A nurse is teaching the family of a client who is receiving treatment for a spinal cord injury with a halo fixation device. Which of the following statements should the nurse make?

"The purpose of this device is to allow for neck movement during the healing process."

"The purpose of this device is to immobilize the cervical spine."

"Turn the screws on the device once each day."

"Apply talcum powder under the vest to limit friction."