A Patient Is Admitted with a Massive Head Trauma

A patient is admitted with a massive head trauma.The patient is unresponsive and on mechanical ventilation.The electroencephalogram is negative for brain waves.The family has agreed to organ donation.How would the nurse check for the absence of cerebral motor reflexes?

A) Performing a sternal rub
B) Applying needle pricks to fingers and toes
C) Clapping hands near the ears
D) Applying pressure to the nail beds or supraorbital ridge