Clonous

Clinic

• Clonus is an entity, characterized by series of involuntary, rhythmic, muscular contractions and relaxations.
• Clonus is a classically associated with UMNS involving descending motor pathways
• It is mostly accompanied by another entity named spasticity
• Range of frequency is from 3 to 8 Hz on average, and may last a few seconds to several minutes depending on the patient’s condition.

Related entities

Fasciculations are spontaneous twitches usually caused by LMNS. But clonus causes large motions that are usually initiated by a reflex.

Myoclonous: It differs from clonus, because of its irregularity.

Related disease

• CP
• Stroke
• MS
• Spinal cord damage
• Hepatic encephalopathy
• Serotonin syndrome