Ataxic cerebral palsy accounts for five to ten percent of all cases of cerebral palsy. In this form of cerebral palsy, there is damage to a part of the brain called the cerebellum that helps maintain balance and coordination. When the cerebellum is damaged, it can result in poor muscle tone or hypotonia, difficulty maintaining balance and a normal gait, tremors, disorders of depth perception and an inability to control the range and motion of voluntary movements. As a result, children with ataxic cerebral palsy often demonstrate a wide-based, unsteady gait. They may also have intention tremors that are tremors that occur while attempting voluntary movements. Voluntary movements are typically clumsy and difficult to perform; finer movements, such as writing, are most severely affected. Coarser movements such as reaching for objects may also be difficult due to altered depth perception. Rapid, involuntary side-to-side movements of the eyeballs, or nystagmus, may also be present. Children with ataxic cerebral palsy may also suffer from several other conditions, such as seizures, mental retardation, and visual and hearing defects.