The Periodic Paralysis Association (PPA) welcomes you to our non-profit organization!

Periodic Paralysis is a group of disorders whereby patients become weak due to triggers such as rest after exercise or certain foods.  These disorders are part of a broader class of disorders called ion channelopathies, in which a genetic defect in a muscle ion channel results in symptoms of episodic stiffness or weakness in response to certain triggers.

⋅ Are you a Patient, Family Member, or Physician seeking information?
⋅ Are you interested in Membership in the PPA and access to our ListServ and Forum? Become a member
⋅ Would you like to ask a question of our Medical Advisors?

These questions and more are answered within our site.  Please feel free to browse the menu on the left as well as our highlights at the bottom of this screen!  We welcome you to the PPA and will do our best to assist you as you search for answers about these rare diseases

Registration for the 2018 Conference in Dublin – Ireland is now opened

Check our announcement page


Read a general Article on Hypokalemic Periodic Paralysis

This site does not deal with paralysis due to stroke or spinal cord injury, but does contain some information about sleep paralysis, which is sometimes confused with periodic paralysis.

Latest news

Frank Lehmann-Horn: June 22, 1948 – May 8, 2018
Dear Periodic Paralysis Community, It is with deepest sorrow that we learned of the passing of Dr. Frank Lehmann-Horn. Frank
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Primary Periodic Paralysis: A Physician’s Personal Experience as a Patient
Primary periodic paralysis (PP) is a group of autosomal dominant channelopathies that cause episodes of paralysis or muscle weakness that have many
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Registration of new members reviewed
Part of the registration is confirming your registration through a received link in your mailbox. Since a lot of new
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