It's not the same thing, because I've had both. When I was small, I had the swaying, rocking (not spinning) bed, and after I was grown I've had spells when every time I went from vertical to horizontal, or vice versa, I'd get dizzy. This would go on for days or weeks, happening every time I changed orientation, then go away, sometimes for years, then come back again. This latter, when we were experimenting with different antidepressants for me, the doctor told me was a withdrawal symptom. No big deal, but while it was going on, I didn't dare stand up and walk after lying down, I'd sit on the bed for a while first, long enough for it to go away, because I might be dizzy enough to fall. Whether the older incidences of it were withdrawal from something, I couldn't remember. I know that I am addicted to caffeine, and have been pretty much all my life except for a few months when I deliberately, carefully tapered off, until I was on zero caffeine and still didn't have any sick feelings or migraines. I suppose those periods might have been when some life habit changed. The rocking bed hasn't been back since I was a child. I found it very comforting, like some adult rocking a baby's crib, except that there was no one there and the bed wasn't really moving, and it was after I'd moved from a crib to a real bed in my own room.
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Asperges me, Domine