A heterogenous group of inherited disorders characterized by recurring attacks of rapidly progressive flaccid paralysis or myotonia. These conditions have in common a mutation of the gene encoding the alpha subunit of the sodium channel in skeletal muscle. They are frequently associated with fluctuations in serum potassium levels. Periodic paralysis may also occur as a non-familial process secondary to THYROTOXICOSIS and other conditions. (From Adams et al., Principles of Neurology, 6th ed, p1481)
Also Known As:
Normokalemic Periodic Paralysis; Familial Periodic Paralysis; Paralyses, Familial Periodic; Normokalemic Periodic Paralyses; Paralyses, Normokalemic Periodic; Paralysis, Familial Periodic; Paralysis, Normokalemic Periodic; Periodic Paralyses, Familial; Periodic Paralyses, Normokalemic; Periodic Paralysis, Normokalemic; Periodic Paralysis, Familial