Jerking
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Jerking
Jerking (/ˈdʒɜːrkɪŋ/), also known as myoclonus in medical terminology, is a sudden, involuntary twitching or spasmodic movement of a muscle or group of muscles.
Etymology
The term "jerking" originates from the Middle English word "jerken," which means to pull sharply. The medical term "myoclonus" comes from the Greek words "myo," meaning muscle, and "klonos," meaning violent motion.
Types of Jerking
There are several types of jerking or myoclonus, including:
- Sleep Myoclonus: This type of jerking often occurs as one is falling asleep.
- Stimulus-Sensitive Myoclonus: This type of jerking is triggered by a variety of external events, including noise, movement, and light.
- Action Myoclonus: This is characterized by muscular jerking triggered or intensified by voluntary movement or even the intention to move.
Related Terms
- Twitch: A quick, jerky movement of a muscle.
- Spasm: A sudden, involuntary muscle contraction.
- Seizure: A sudden, uncontrolled electrical disturbance in the brain, which may cause changes in behavior, movements or feelings, and levels of consciousness.
- Convulsion: A sudden, violent, irregular movement of the body, caused by involuntary contraction of muscles and associated especially with brain disorders such as epilepsy, the presence of certain toxins or other agents in the blood, or fever in children.
See Also
External links
- Medical encyclopedia article on Jerking
- Wikipedia's article - Jerking
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