Indeed...ive just considered to use the word "ghost", "ghostly" or some other one of the kind...and simultaneously thought of some word relating something to do with "memory"; then i discarded either of them...perhaps because i started wondering about the relation between "memory" (say, Time), and "ghosts"...
Actually, the idea of a ghost may be thought of one accuratelly depicting the sketch, in so far as this lends itself to be taken as one in which there is "something caged"...obviously speaking of the psychological side of it (i say this because i figure a doctor, say neurologist or something, telling something altogether-practical like..."it has to do with body...nevermind about anything else...go and take this pill..." and so on...).
On another level, i must say that i cant help but to let in some hypothesis taking into account the average-degree of daily physical activity by those (me...) eventually suffering these symptons: there has been several years for me lately, in which i literally used to stay put for very long hours (studying and reading books, largely); except for a couple of hours a day, say twice a week, where i used to go running...
So to speak methaphorically, i would say that, as one take the daily living resting upon a sort of thought-like task, then the body might appear to say: "well...it seems that you just have forgotten about me...Do you really think im nothing but a ghost"?
Even on another level, i remember that after a period (say a year and half) in which i used to do meditation (for almost an hour long at times, indeed), i eventually started to feel like wordly-business was not but pretty sluggish...
Anyway, i actually described such things but not a single bit to deny the "inmanent" side of the (so called) syndrome...that of the close-body-like side of it...
Greetings!!