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I've been following the discussions on freezing and I would suggest that some confusion results from semantics. Immobility while lying in bed is not what I would term freezing although I can see how people might easily refer to such a state as being "frozen". I believe freezing in the neurologic linguo refers to problems of ambulation. The distinction is significant because the causes of each are distiinct. I would define freeziing as: the inability to sustain gait in an environment compatible with gait and the subject's intention to sustain gait. I would speculate that there are two categories of pathology that are repsonsible for freezing. One, I believe, is a result of disturbances in the autonomic nervous system (ANS) and is seen as abnormal response to environmental tension inducing sitiuations. An example is freezing which occurs while trying to cross a busy street or getting to a ringing telephone. The second is visual and has to do with the occlusion of peripheral vision for example by the walls that frame a doorway. (Most of us would not freeze going through a "doorway" made of thin sticks or while closing one's eyes.) The "frozen" in bed syndrome has more to do, I believe, with the rigidity of being undermedicated. Such rigidity , I believe, is a consequence of increased muscle tone (also an ANS disturbance) but the distinction is that in freezing this ANS pathology is induced by the environment and can occur while fully medicated while in the "frozen in bed state" it comes from being undermedicated. regards, Tom