Trembling
Trembling
Trembling (/ˈtrɛmblɪŋ/), also known as tremor, is an involuntary, somewhat rhythmic, muscle contraction and relaxation involving oscillations or twitching movements of one or more body parts. It is the most common of all involuntary movements and can affect the hands, arms, eyes, face, head, vocal folds, trunk, and legs.
Etymology
The term "trembling" comes from the Middle English word tremblen, which means "to shake with fear". This term is derived from the Old French trembler, which is believed to have been influenced by the Medieval Latin word tremulare.
Types of Trembling
There are several types of trembling, including:
- Essential tremor: This is the most common type, often affecting the hands and head but can also cause trembling in the voice, arms, and legs.
- Parkinson's disease: This disease often starts with a slight tremor in one hand. Tremors caused by Parkinson's disease are most apparent when the hand is at rest.
- Dystonic tremor: This occurs in individuals of all ages who are affected by dystonia, a movement disorder in which your muscles contract involuntarily.
- Physiologic tremor: This is a fine, slight tremor that is visible under close observation, and it often occurs in every normal individual.
Related Terms
- Tremor: An unintentional, rhythmic muscle movement involving to-and-fro movements (oscillations) of one or more parts of the body.
- Shaking: A term often used to describe visible tremors.
- Quivering: A slight trembling movement.
- Convulsion: A sudden, violent, irregular movement of the body, caused by involuntary contraction of muscles and associated especially with brain disorders.
External links
- Medical encyclopedia article on Trembling
- Wikipedia's article - Trembling
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