Source: Tetanus image, Public domain: http://en.wikipedia.org/wiki/File:Opisthotonus_in_a_patient_suffering_from_tetanus_-_Painting_by_Sir_Charles_Bell_-_1809.jpg
The wasting away of muscle tissue leading to very weak muscles.
An involuntary muscle contraction often caused by potassium deficiencies.
A genetic disorder that causes the gradual breakdown of muscle fibers.
Muscle fiber tears or stretches too far.
A disease caused by microbes that causes muscles to continually spasm.