Convulsion vs. Tremor — What's the Difference?

A convulsion is a medical condition where body muscles contract and relax rapidly and repeatedly, resulting in uncontrolled shaking. Because epileptic seizures typically include convulsions, the term convulsion is sometimes used as a synonym for seizure.

A 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.

An intense, paroxysmal, involuntary muscular contraction.

A shaking or vibrating movement, as of the earth.

An uncontrolled fit, as of laughter; a paroxysm.

An involuntary trembling or quivering, as of the hands.

Violent turmoil

A state or feeling of nervousness, worry, or excitement

(medicine) An intense, paroxysmal, involuntary muscular contraction.

A tremulous sound; a quaver

An uncontrolled fit, as of laughter; a paroxysm.

A shake, quiver, or vibration.

Violent turmoil.

A rhythmic, uncontrollable shaking of all or part of the body due to partial muscle contractions.

An unnatural, violent, and unvoluntary contraction of the muscular parts of an animal body.

An earthquake.

Any violent and irregular motion or agitation; a violent shaking; a tumult; a commotion.

To shake or quiver excessively and rapidly or involuntarily; to tremble.

A sudden uncontrollable attack;

A trembling; a shivering or shaking; a quivering or vibratory motion; as, the tremor of a person who is weak, infirm, or old.

Violent uncontrollable contractions of muscles

An involuntary vibration (as if from illness or fear)

A violent disturbance;

A small earthquake

A physical disturbance such as an earthquake or upheaval

Shaking or trembling (usually resulting from weakness or stress or disease)

Shake with seismic vibrations;