My wife had a stroke in December 2012. She has no weakness in her body, but still says the wrong words most of the time. She gets confused easily. It has been 15 months and she still sleeps 18 hours a day! She is up at 9am, back in bed at 10:30am, up at 1:30pm, back in bed by 3pm, up at 7pm, and back in bed by 10pm. During this time she is sleeping soundly. Even at night for 11 hours, she sleeps soundly. Is this normal?