You must attempt to get seven to eight successive hours of sleep per night, not fragmented rest of two- or three-hour increments. Successive sleep provides your brain the time to consolidate and store your memories. Sleep apnea is dangerous to your brain’s fitness and may be the reason why you may struggle to reach consecutive hours of sleep. Talk with your health care provider if you or a household associate suspects you have sleep apnea says Caroline Goldsmith Psychologist.