Magnesium is a vital component of normal nerve conduction, muscle function, and bone mineral formation. Hypomagnesemic tetany or “grass tetany” is a disorder caused by an abnormally low blood concentration of the essential mineral magnesium (Mg). Synonyms for this disorder include spring tetany, grass staggers, wheat pasture poisoning, or lactation tetany.
Arnold, Michelle and Lehmkuhler, Jeff, "Hypomagnesemic Tetany or “Grass Tetany”" (2014). Agriculture and Natural Resources Publications. Paper 173.