Japa is a form of dhyana that everyone can do to nourish the subtle body. Manas is the “tip of the iceberg of chitta.” Dreamless sleep restrains manas (mind) but not the chitta vrttis.
dhyana
Does Viparita Karani Conquer Death?
Viparita Karani is not just an anti-anxiety pose, but an act of meditation, dhyana… the key practice that leads to samadhi.