Hmm...if he fell off his branch it's probably something like injury or neuro, and not parasites or husbandry. I would try to contact dr. frye, he is the only person that jumps to mind in diagnosing this stuff. his site is http://fryebrothersfrogs.com and it has his contact info.
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A room of herps.
www.freewebs.com/kapoktree