A client is admitted following a motor vehicle collision. When assessing the client's level of consciousness, the nurse notes that the client no longer responds to commands. The nurse initiates a painful stimulus and the client responds by pulling the arms inward with elbows and wrists flexed and extending the legs with the toes pointed downward. Which action should the nurse implement?

Choice A rationale: The described posture is decorticate posturing, a sign of severe brain damage. This indicates a deteriorating neurological status and requires immediate reporting to the healthcare provider to prevent further injury. Choice B rationale: The client's response is a non-purposeful, reflexive motor movement rather than a purposeful attempt to remove the painful stimulus. Documenting it as a purposeful response would be clinically inaccurate and misleading. Choice C rationale: While neurological injury increases seizure risk, decorticate posturing is a direct sign of midbrain or cortical dysfunction. The immediate priority is addressing the underlying cause of the abnormal posturing and neurological decline. Choice D rationale: Administering an analgesic could mask further neurological changes and depress the central nervous system. The priority is a full neurological assessment and notifying the physician of the client's severe motor response.