People placed in isolation tanks for long periods have reported that consciousness seemed to become more vivid when deprived of external stimuli but that it was increasingly less grounded. Without real world input consciousness does not shut down it constructs its own simulated input.

Well i read somewhere that in absence of signals the brain would just gradually become more sensitive until it even responds to things that aren’t there, basically hallucinating.

We haven’t even figured out what qualifies as consciousness and what doesn’t. Studying something that’s not clearly defined won’t be easy. Also, we might be thinking about it in the wrong way, asking the wrong questions and using the wrong words.

I’m dumb so don’t listen to me but doesn’t the brain hallucinate when confronted with like a lack of stimuli? Thinking of deprivation tanks and isolation experiments and such.