Sleep apnea is a sleeping disorder in which you experience frequent breathing pauses while sleeping. In case of some, the pauses may last for just a few seconds, while for others, it may continue for a few minutes. Sleep apnea is generally chronic in nature. There are three types of sleep apnea, namely Central, Obstructive and Complex sleep apnea. Central sleep apnea occurs if the brain fails to transmit signals to the muscles responsible for your breathing functions.