This is the phenomenon which you will find in lazy persons as well.I would say they r partly suffering with PD. The lazy man does not want to wake up in the morning,wakes up,yes,but sleeps more longer,this is the classic example of body over mind phenomenon. Yoga, asanas & pranayam are the only medicines for PD.This is the country of spiritual persons,embrace it & make a difference in your own others lives. God give all PD patients the strength to overcome it. All the best.