In northern Scandinavia, the prevalence of<unk>  has been estimated at 1:10,000.<unk>  is estimated to affect 1 in 100,000 people worldwide.
Myotonia congenita
Myotonic dystrophy
Paramyotonia congenita
Periodic paralysis
Klumpke paralysis
Quadrigia
Cardiofaciocutaneous syndrome
Hyperkalemic periodic paralysis