Clonus & Ankle clonus ( A qucik Guide ) Clonus is a series of involuntary, rhythmic, muscular contractions and relaxations. Ankle clonus is commonly tested to assess upper motor neuron lesions. How to Elicit: Patient Position: Supine Examiner’s Technique: 1. Support the leg under the knee to keep the muscle relaxed. 2. Dorsiflex the ankle briskly and maintain pressure. 3. Observe for rhythmic oscillations of the foot. Types of Clonus: .Sustained Clonus: Continuous rhythmic contractions while dor