If you are looking for the Spanish edition ( Por Qué Dormimos ) or the original English version in digital formats:
The quality of deep NREM sleep required for physical repair. Por QuГ© Dormimos Matthew Walker epub
Walker highlights dreaming as a "virtual reality" space where the brain integrates past and present knowledge to inspire creativity. REM sleep also acts as "overnight therapy," taking the "sting" out of painful emotional memories. Walker provides actionable tips to improve sleep quality: If you are looking for the Spanish edition