Tremor vs. Clonus — What's the Difference?

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.

Clonus is a set of involuntary and rhythmic muscular contractions and relaxations. Clonus is a sign of certain neurological conditions, particularly associated with upper motor neuron lesions involving descending motor pathways, and in many cases is, accompanied by spasticity (another form of hyperexcitability).

A shaking or vibrating movement, as of the earth.

An abnormality in neuromuscular activity characterized by rapidly alternating muscular contraction and relaxation.

An involuntary trembling or quivering, as of the hands.

(medicine) A muscular spasm with regular contractions.

A state or feeling of nervousness, worry, or excitement

A series of muscular contractions due to sudden stretching of the muscle, - a sign of certain neuropathies.

A tremulous sound; a quaver

Convulsion characterized by alternating contractions and relaxations

A shake, quiver, or vibration.

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

An earthquake.

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

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

An involuntary vibration (as if from illness or fear)

A small earthquake

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

Shake with seismic vibrations;