Case study. jonathan is 29 yrs old and because of high cost of gasoline, he has been riding his motorcycle rather than driving his half-ton pick up back and forth to work in order to save money. the temperature is 95 degrees so jonathan decides to not to wear his helmet on his way home from work. one mile down the freeway, jonathan changes lanes and is hit by a car, he sustains a severe head injury and he is transported to the local hospital and admitted to the intensive care unit. jonathan is unresponsive, what criteria will be used to determine if jonathan is brain dead