Clonus is an abnormal reflex response that involves involuntary and rhythmic muscle contractions. It can be a sign of an underlying medical condition, such as a brain injury or cerebral palsy.

Clonus is a rhythmic, oscillating, stretch reflex. The cause of the oscillations are related to lesions in upper motor neurons and is generally accompanied by hyperreflexia. Therefore, clonus is used as …

Jan 1, 2025 · Clonus refers to a reflex response to a muscle stretch that produces involuntary and repetitive muscle contractions. Common causes of clonus include multiple sclerosis, cerebral palsy, …

Clonus is most commonly found at the ankle, specifically with a dorsiflexion/plantarflexion movement (up and down). [2] Some case studies have also reported clonus in the finger, toe, and laterally in the …

Aug 8, 2023 · Clonus is a rhythmic oscillating stretch reflex that is related to upper motor neuron lesions. Therefore, clonus is generally accompanied by hyperreflexia. Testing for clonus is performed as part …

Nov 23, 2023 · Clonus, or the clonus reflex, is a neurological condition that results from damage to the nerve cells that control muscles. It can cause involuntary contractions, spasms, pulsing, tightness,...

Jul 13, 2023 · Clonus is a neurological condition characterized by involuntary, rhythmic muscle contractions and relaxation. These repetitive movements often occur in response to sudden …

Dec 6, 2025 · Clonus is a neurological sign characterized by involuntary, rhythmic muscle contractions and relaxations. This phenomenon is an abnormal reflex response that occurs when a muscle is …

Jul 14, 2025 · Clonus or clonus reflex, is an abnormal neurological reflex causing involuntary muscle contractions, spasms, pulsing, tightness, and pain, resulting from central nervous system (CNS) …

Symptoms of clonus may include rhythmic shaking or jerking movements in the affected muscles, muscle stiffness or rigidity, and difficulty controlling or coordinating movements.