Related Clues:

• Muscle problem
• Involuntary twitch
• Sudden convulsion
• Back attack
• Muscle cramp, for one
• Fleeting muscle problem
• Involuntary muscular contraction
• Muscle malady
• Hiccup
• Contraction
• Involuntary muscle contraction
• Big jerk
• Sudden jerk
• Throe
• Writer's cramp, for example