Because doctors and nurses can't tell the difference between the top of a head and the back of a head.
Next you'll be telling us that doctors and nurses can't tell the cerebellum from the cerebrum...
Heavily distracted witnesses make poor witnesses.
Are doctors good at telling the top of the head, or the right front of the head from the right rearward part of the head? Of telling the difference between the cerebellum and the cerebrum? Ordinarily, yes.
Are people good at spotting the ?gorilla? when they see a man in a gorilla suit walk across the frame and beat his chest? Ordinarily, yes.
But when witnesses are heavily distracted, it?s a different story. When it doesn?t matter if the large head wound is on the top of the head or the right front part of the head, or the right rear part of the head, when it doesn?t matter if they are seeing the cerebellum or the cerebrum. When they are concentrating on what they have been trained to concentrate on:
with a patient with a major head wound, with a very week heartbeat, with very weak breathing, they need to:
**** make an emergency transfusion of blood.
**** hook up an IV to introduce other critical medicine.
**** consult with his doctor (if available, which he was) to see if any special treatment was recommended for this particular patient
**** check, and check again, and again, and again, the heartbeat and breathing, so they can know, as soon as possible, if any disparate action needs to be done immediately, like opening up the chest.
And not get distracted making unimportant observations, which can wait until the most critical tasks are completed and the patient is, at least, somewhat stablished. Until then, they are no more likely to notice the type of brain matter showing than they are to notice that one of the nurses is wearing a gorilla mask.