There are two kinds of sleep apnea: obstructive apnea and central   The Mastery of Sleep Review apnea. Chronic snoring that result from a blocked or partially blocked airway always signifies obstructive apnea. When air squeezes past the blockage, unusually loud snoring occurs, at which time the apnea sufferer moves from deep sleep to light sleep. The breathing interruptions commonly occur between 5 and 30 plus times per hour on three or more nights per week and result in daytime tiredness due to lack of deep sleep.

 Unlike obstructive apnea, central apnea is characterized by shallow breathing that result from the brain's failure to communicate the proper breathing actions to the breathing muscles, which causes a person to gasp for air instead of snore. Other signs of both obstructive and central apnea include morning headaches, memory or learning problems, irritability, poor concentration, changes in mood and dry mouth or throat upon awakening.Central apnea is less common than obstructive apnea, but they are equally dangerous to a person's health. While the greatest drawbacks of apnea may seem to be snoring and daytime tiredness, there is much more at stake concerning a person's long-term health. 

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