Mainly, research seemed to confirm existence of subtypes. While other could not corraborate. Some even suggested there are no subtypes but just a representation of the various stages of disease progression and response to meds. This may be a viable explanation for some PWP, but I think that anyone who knows a few PWP would beg to differ on this.

Laura[/QUOTE]

Laura,
Good point. To me, the basic classification of subtypes based on physical features of PD are tremor-dominant and rigidity dominant types. That is the first thing I noticed about PD (tremor vs rigidity) and is not a response to meds atleast during the early stages of PD. I just started reading about PD sub-types a few days ago and like you surprised by what I found out there.

Have you seen any studies that classify Tremor vs rigidity as the first order of classification??

Some time ago, there was a poll going on this subject, does anyone remember what the conclusions were?

Thanks
girija