4. Narcolepsy
Narcolepsy is a potentially dangerous brain disorder that affects the ability to control sleep-wake cycles. This means a person could potentially fall asleep while walking down a flight of stairs or crossing a busy street. Narcolepsy service dogs have the ability to detect a subtle biochemical change in the form of an odor when an attack is coming on. They can warn their masters to seek safety up to 5 minutes before an attack, and they are trained to stand over them protectively if out in public.
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