A community for people with Hereditary Spastic Paraplegia/Familial Spastic Paraparesis (HSP/FSP), or Primary Lateral Sclerosis (PLS). An extension of the Spastic Paraplegia website, the only organization in the Americas for the upper motor neuron disorders HSP and PLS. This forum provides online chat, file sharing, calendar functions and polls. MESSAGES IN THIS FORUM ARE TURNED OFF. PLEASE USE THE HSP-L DISCUSSION LIST INSTEAD: