Page "Coma" Paragraph 13

# Make sure patient is in an actual comatose state and is not mistaken for locked-in state ( patient will either be able to voluntarily move his eyes or blink ) or psychogenic unresponsiveness ( caloric stimulation of the vestibular apparatus will result in slow deviation of eyes towards the stimulation followed by rapid correction to mid-line ; this response can't be voluntarily suppressed: therefore, if the patient doesn't have this response, then psychogenic coma can be ruled out as a differential )