There are five phases of sleep: stage1, stage2, stage3, stage4 and REM each of us pass via each evening when we go to sleep.
1) Could you please help with this question by explaining each five stages?
2) Then, view the Sleep Disorders video and match one stage of sleep with one of the sleep disorders explained in the video, describing the connection between the stage of sleep and disorder chosen. (Maybe Stage 5 if you find one that is better, then you is free to make that choice if you like)
This is The Sleep Disorder Video web site,
https://www.youtube.com/watch?v=X2yfUL8uct0&feature=related
This video describes the various sleep disorders and their impact on daily living in Western.