On the flip side, there are people who chronically fall asleep too much, often at unusual times. Like Mr. Benedict from the Mysterious Benedict Society book series, narcoleptics are susceptible to sudden, uncontrollable sleep attacks. Sufferers of this disorder may stop talking midsentence and fall asleep or become extremely drowsy after being triggered by a stressor.
Obviously, randomly sleeping can be inconvenient for sufferers, like in driving, eating, or their daily careers. Narcolepsy is linked to a lack of the neurotransmitter hypocretin, which keeps humans alert and awake.
Apparently, dreams support neural development by stimulating the brain through brain chemical reactions and interactions. This may be why babies sleep for up to 16 hours a day! This way, babies cognitively develop because dreams mimic reality, allowing them space to further explore and understand the world.