Whiteshadow: I am one of those who have had extended dream periods, as you call them. If I were to somehow alter the way I could LD, it would be to make all dreams extended. It would add years to your life! Think of all the experiences you could have if you dreamt a full dream-week every night. I also believe that it is the brain speeding up and showing you images at a faster rate, though it doesnt seem any faster in the dream.