Final answer:
The nurse determines that the child's condition indicates deterioration in neurological function.
Step-by-step explanation:
The nurse makes the determination that the child's condition is indicative of deterioration in neurological function.
The decorticate posturing, which is characterized by the extension of the upper and lower extremities with internal rotation of the upper arms and wrists and the knees and feet, is a response to increased intracranial pressure and is a sign of neurologic dysfunction.