i don't know much about neurology, but isn't it a bit of a problem to define such a diverse set of symptoms under the same label? Are we even sure, that this va

i don't know much about neurology, but isn't it a bit of a problem to define such a diverse set of symptoms under the same label? Are we even sure, that this variety of symptoms can be explained by a single root cause, or if they are even related at all?