CP is a disorder affecting movement.
Cerebral palsy ( CP ) is a group of permanent movement disorders that appear in early childhood . Often babies with cerebral palsy do not roll over , sit , crawl , or walk as early as other children of their age . Cerebral palsy is caused by abnormal development or damage to the parts of the brain that control movement , balance , and posture . CP is the most common movement disorder in children . Epileptic seizure . The outward effect can vary from uncontrolled jerking movement ( tonic-clonic seizure ) to as subtle as a momentary loss of awareness ( absence seizure ) .