Convulsion refers to a sudden, involuntary contraction or spasm of muscles, often accompanied by uncontrolled movements of the body. Convulsions are typically symptomatic of neurological disorders or conditions that affect the brain's electrical activity. They can vary in severity and duration, ranging from mild twitching to intense shaking or jerking of the limbs and body. Convulsions are a common symptom of seizures but can also occur in response to other medical conditions or triggers.