What reseachers have to say about the wide diference in the speed of progression of PD and types of symptoms ? Some may exibit tremors (and some only tremors) just as others do not have tremors but instead so many different types of symptoms. The same difference is observed on the onset of the PD. Some PDers start will the illness with very mild symptoms that progress very very slowly and some have a rapid deterioration of theirs symptoms and some of the symptoms appears abruptly and strong on the contrary of others patients. What would these differeces imply ? Regards, +----| Joao Paulo de Carvalho |------ + | [log in to unmask] | +--------| Salvador-Bahia-Brazil |------+