Primary periodic paralyses are hereditary disorders caused by mutations in genes encoding skeletal muscle channel proteins, leading to episodic muscle weakness and paralysis.
Periodic paralyses are a group of disorders characterized by episodes of muscle paralyses. They are mainly divided as primary (hereditary) and secondary (acquired) periodic paralyses. Primary periodic paralyses occur as a result of mutations in genes encoding subunits of muscle membrane channel proteins such as sodium, calcium, and potassium channels, resulting in impairment of their properties. Primary periodic paralyses are further classified on the basis of affected ion channels and other associated complications. Some of these periodic paralyses are hyperkalemic periodic paralysis (Na-channel mutation), hypokalemic periodic paralysis (Na- or Ca-channel mutation), Andersen's syndrome (K-channel mutation), etc.
Farooque et al. (Sat,) conducted a review in Primary periodic paralyses. Primary periodic paralyses are hereditary disorders caused by mutations in genes encoding skeletal muscle channel proteins, leading to episodic muscle weakness and paralysis.
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