Hypersomnia: This is a condition where a person experiences excessive sleepiness during the day or spends an unusually long time sleeping.
Sleep Apnea: This is another sleep disorder where breathing repeatedly stops and starts during sleep, leading to poor quality of sleep and fatigue during the day.
Cataplexy: A sudden loss of muscle tone while awake that leads to feelings of weakness and a loss of voluntary muscle control. It's often associated with narcolepsy.