Primary periodic paralysis (PPP) is a group of rare diseases that temporarily make muscles stiff, weak, or unable to move. These episodes can last from a few minutes to a few days, depending on the ...

The periodic table arranges all the chemical elements in a specific way. Patterns are visible in the way that elements behave, and this allows us to make predictions about other elements. Gethin: And ...

Hypokalemic periodic paralysis (hypoPP or hypoKPP) is a rare disorder in which a person experiences episodes of painless muscle weakness and often paralysis. It’s the most common of several genetic ...