Sentence:  The passage describes a lived face that, under conditions of <WSD>hyperreflexive</WSD> awareness and diminished self-affection, seems to be turned inside out, flattened and extruded until it becomes a kind of fluid mask — a fragile lived membrane of squirming sensitivity and kaleidoscopic pattern that seems to lift off from his head to float independently in the air. 
Meaning of the word marked with <WSD> tags:  Tending toward abnormally high levels of introspection.