[lee-usmle]

Although it's often referred to as the narcolepsy tetrad am going to make it a pentad for USMLE and mnemonic purposes.

Just remember CHASE

here's the key

• Cataplexy, sudden loss of tone while awake. Considered by many as a pathognomonic sign of narcolepsy.
• Hypnagogic hallucinations experience as the patient falls into sleep (don't confuse with hypnapompic which occurs while waking up and can be seen in normal people)
• Automatism (Automatic behavior) in which the sleeper continues to do wakefullness behavior such as talking or throwing objects.
• Sleep paralysis, as with Cataplexy this symptom is though to be due excessively activated REM sleep.
• Excessive Daytime Sleeping (EDS), remember that this is also seen in patients with sleep apnea