What is the Difference Between Similar But Different Things, Terms, and Objects

What is the Difference between Hypopnea Insomnia Narcolepsy and Sleep Apnea

Sleep is very important for a healthy mind and body. For a normal and healthy living, six to eight hours sleep is necessary. Some people suffer from sleeping disorders, like Insomnia, Narcolepsy and sleep Apnea. Some people suffer from excessive sleep disorders, while others have sleeping disturbances.