Normal response is for the eyes to move with the head. A positive doll's eyes, an abnormal response, occurs when the eyes constantly look upward, regardless of which way the head is turned. For example, the right side may exhibit decorticate posturing and the left side may be flaccid. Vital signs Vital signs changes are very late neurological indicators. Changes in respiratory pattern and rate, heart rate and blood pressure indicate pressure on the vital centers in the brainstem.
Respiratory patterns help identify the level of brainstem dysfunction.
Cushing's Triad - pressure on the medulla of the brainstem causes bradycardia, bradypnea and systolic hypertension. The presence of these three signs indicates impending brainstem herniation through the Foramen Magnum and death.