The patient's sleep patterns consist of going to bed between 9.00 and 10.00 p.m. and awakening in the morning between 5.00 and 6.00 a.m.  She reports difficulty in initiating sleep and then recurrent awakenings every 1 to 2 hours throughout the night.  She reports tossing and turning throughout the night and awakening with the sheets in disarray.  She reports that her sleep was much better quality in the sleep laboratory as compared to home.  When she awakens, she might have a dull headache and feels tired in the morning.  Her daughter reports that she has heard the patient talking during sleep and snoring.  There are no apneic episodes.  The patient reports that she used to cough a lot in the middle of the night, but has no longer been doing so in recent weeks.