Cerebral palsy is a non-progressive neurological condition resulting in motor impairments that can change over time. In about one-third of children with cerebral palsy, one side of the body is affected much more than the other. The impairments may originate directly from damage to an immature brain, or indirectly from compensatory movements or disuse during development. The disuse of the more affected arm is a natural consequence of children wanting to manipulate objects and therefore preferentially using the less affected arm in daily life. However, this means that much of the impairment of the more affected arm could be a form of "learned disuse", rather than from the initial damage to the brain.