Definition of "myotonia" []

• Tonic spasm or temporary rigidity of one or more muscles, often characteristic of various muscular disorders. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "In short, these goats seize up when they get excited due to a quirk in their genetics, called myotonia congenita ."
• "The reason that fainting goats faint is that they have a hereditary genetic disorder called myotonia congenita."
• "Vanderbilt University School of Medicine, Nashville, Tennessee, United States of America Myotonic dystrophy types 1 and 2 (DM1 and DM2) are forms of muscular dystrophy that share similar clinical and molecular manifestations, such as myotonia, muscle weakness, cardiac anomalies, cataracts, and the presence of defined RNA-containing foci in muscle nuclei."