¿Cuales son las causas del Síndrome de la Persona Rígida?
Causas de Síndrome de la Persona Rígida: factores genéticos y ambientales explicados y revisados con fuentes médicas, más la perspectiva de los pacientes.
Original
No one knows what causes SPS. However in my case and a few others I know of, there is some genetic component behind it, we just don't know what it is that makes it genetic in some cases and not in most others.