mentation

the process of using your mind to consider something carefully; "thinking always made him frown"; "she paused for thought"

जब सभी भाव गायब हो जाते हैं और विचार-प्रक्रिया कम या अनुपस्थित होती है तब व्यामोह आता है|

when all ideas disappear and mentation is reduced or absent then comes the stupor.