An Individual Is Taking Part in a Sleep Study

Multiple Choice

An individual is taking part in a sleep study. He is attached to all of the EEG recording electrodes. Just before the study is to start, he suddenly falls down, is immobilized and goes immediately into sleep. You suspect narcolepsy. Which of the following would support your theory

A) a decrease in the level of melatonin
B) a decrease in the level of serotonin
C) a sensitivity to blue light
D) a severe lack of hypocretin
E) increased activity in the thalamus