Final answer:
To prevent increased intracranial pressure during a neurologic assessment, the nurse should encourage deep breathing and turning side to side.
Step-by-step explanation:
To prevent increased intracranial pressure during a neurologic assessment, the nurse should encourage deep breathing and turning side to side (b). These actions help promote healthy blood flow and prevent the build-up of pressure in the brain. Coughing, Valsalva maneuver, bearing down, and complete bed rest without movement (a, c, and d) can actually increase intracranial pressure and should be avoided.