I have been having problems with memory and it is affecting my work. I am tired all the time. I recently had a sleep study that showed 3 episodes of obstructive apnea 142 arousals and 0% REM. The doctor suggested a CPAP. I had another sleep test for CPAP titration. 0 sleep obstruction, multiple arousals, 5 central apneas, and again 0% REM. If a person doesn t get any REM sleep, won t that affect memory and how can it be treated?