Yes, I meant the 'ghost's body'/soul actually, not the mental cogitation where it can feel stimulus. Although ghost probably can still feel with their 'ghost body', the state of the ghost form are seems to be in true stasis of naturally and permanently unchangeable (until someone break it artificially). One more step of turning off their mind and it's technically become a case of true stasis (of soul). /mad meta-idea
Alas, I understand you want something that perfectly shut off every sense and the body stay preserves a long time on a live subject artificially, but we could dig a bit deeper as to understand how the natural law of the world can naturally sustain this form of stasis of an astral being in such permanency.
Edit: Ah, maybe I shouldn't use the word stasis, and use 'permanent' or 'equilibrium' instead for the ghost example as that's more of my point by definition.