A miniature actigraph worn around the wrist (Mini Motionlogger, Ambulatory Checking, Inc. Ardsley, NY) was utilized To judge sleep quality objectively, rendering it achievable to watch sleep below normal situation with minimum distortions. The actigraph measures wrist exercise utilizing a piezoelectric element and translates wrist movements into an electrical https://www.youtube.com/watch?v=PgNzdZr0_hg