A miniature actigraph worn about the wrist (Mini Motionlogger, Ambulatory Checking, Inc. Ardsley, NY) was applied to evaluate sleep good quality objectively, rendering it probable to watch sleep under purely natural situation with minimal distortions. The actigraph measures wrist activity utilizing a piezoelectric aspect and interprets wrist actions into https://www.youtube.com/watch?v=PgNzdZr0_hg