People with athetoid dyskinetic cerebral palsy experience slow, involuntary, writhing movements of the arms, hands and legs. They may also experience involuntary facial grimaces and drooling. Sitting straight or walking are difficult. Holding on to objects or performing deliberate actions, such as brushing the hair, are difficult. Some people with the disorder have difficulty speaking. Eating and swallowing can be impaired, making it difficult for the patient to get adequate nutrients.
The mixed muscle tone caused by the disorder contributes to these problems; muscle tone fluctuates between being too tight and being too loose. Muscle spasms are sometimes caused by the fluctuating muscle tone.
Despite these severe disabilities, the mental ability of patients with athetoid dyskenetic cerebral palsy is seldom affected. These patients usually have normal or even above average intelligence.