Neurology physical examination on Instagram: "Rebound Phenomenon (also called Holmes Rebound Phenomenon) is a classic cerebellar sign seen in patients with cerebellar lesions—especially involving the spinocerebellum. --- Definition It is the inability to stop a movement after an external resistance is suddenly removed, due to loss of normal "check" reflex (braking mechanism) of muscles. --- Normal Physiology When you push against a resistance (e.g., your arm flexes against the examiner’s hand),