I am the son of someone who has been diagnosed with "atypical PD" and found your post to be most informative. At one point, PSP was considered but my father does not have the ocular paralysis typical of that disease. Now, I'm left with little guidance as to what exactly his condition actually is and thus, the "atypical PD" label. Would you be so kind as to point me to any other books, articles, Web sites, *etc*. regarding the conditions you described. Thanks a lot for the material you have already provided and any other info you might be able to share. Jim Devor [log in to unmask] P.S. I will never again leave unchallenged snide remarks about AOLers on the Net