What is the definition or description of: twitches during sleep?

Sleep myoclonus: Small twitching or jerking of the limbs and body during sleep is a normal phenomenon. A larger jerk just as someone falls asleep is also quite normal. Twitching ( myoclonus) is actually more likely to disturb the bed partner than the person affected. These movements can , at times, lead to broken enough sleep to cause daytime symptoms. Myoclonus can occur alone or be part of another illness.

NORMAL TO ABNORMAL: Nocturnal twitches can be normal when falling asleep and brief myoclonic jerks occur, but if these awaken one from sleep, these are abnormal. Usually tremors present when awake disappear at sleep, but fasciculatory muscle activity may persist, such as ALS activity. Typically during dreams, motion ceases, unless a rem disorder where violent movements may ensue. Restless leg is another disorder.

Sleep Twitches: Possible diagnoses include: 1. Restless legs syndrome: leg discomfort brought on by rest and temporarily relieved by movement. 2. Periodic limb movement disorder: repetitive jerking of legs during sleep. 3. Hypnic jerk (normal): muscle twitch occurring at sleep onset - sometimes associated with sensation of falling. Consult with a local sleep medicine specialist for further information.