The line between weakness and paralysis
is not absolute. A condition causing weakness may progress to paralysis
. On the other hand, strength may be restored to a paralyzed limb. Nerve regeneration or regrow is one way in which strength can return to a paralyzed muscle. Paralysis
almost always causes a change in muscle tone. Paralyzed muscle may be flaccid, flabby, and without appreciable tone, or it may be spastic, tight, and with abnormally high tone that increases when the muscle is moved.