Wikipedia
Amanaskata
Amanaskatā is the alert state of dynamic fullness of the self ( atman), it is the condition where there is no mind, the mindless state; it is the state when the mind dissolves and the self shines. It is the transmental state which is also called no-mindedness (unmani) and yogic sleep ( yoga-nidra) as the prolonged absorption in the formless ecstasy or nirvikalpa samadhi; it is the state in which the jivanmukta (liberated being) exists experiencing a sense of universality. According to the Laya-chintana of Antahkarana ('mind'), the mind is absorbed in Mahat ( Buddhi), 'Individual Buddhi' is absorbed in the 'Cosmic Buddhi', 'Cosmic Buddhi' in Avyakta which is Brahman; in other words, the effect is absorbed into cause.