Non- spastic cerebral palsy is decreased and/or fluctuating muscle tone. The various forms of non- spastic cerebral palsy are characterized by specific impairments. One of the main characteristics of non- spastic cerebral palsy is involuntary movements. These movements can be slow or fast, often repetitive, and sometimes rhythmic. Planned movements can exaggerate the effect. This condition is known as intention tremors. In addition to that, stress can also worsen the involuntary movements. On the other hand, sleeping eliminates them.
An injury to the brain outside the pyramidal tract causes non- spastic cerebral palsy. The location of the brain damage lowers the likelihood of seizures and mental impairment. Also, this type of cerebral palsy lowers the likelihood of joint and limb deformities. Speech difficulties may occur due to physical, not intellectual impairments.
Non- spastic cerebral palsy is categorized into two groups: ataxic and dyskinetic. They make up 20% of the cases of cerebral palsy. Dyskinetic makes up 15% and ataxic makes up 5%.
Ataxic cerebral palsy affects coordinated movements, as well as balance and posture. The individual’s gait is often very wide and sometimes irregular. Control of eye movements and depth perception can also be impaired. Fine motor skills requiring coordination of the eyes and hands are difficult.
Dyskinetic cerebral palsy is separated into two different groups: athetoid and dystonic.
Athetoid cerebral palsy includes cases with involuntary movement, especially in the arms, legs, and hands.
Dystonic cerebral palsy involves cases that affect the trunk muscles more than the limbs and results in a fixed, twisted posture.
Due to the fact that non- spastic cerebral palsy is mainly associated with involuntary movements, some people may classify cerebral palsy by the specific movement impairment such as:
Athetosis: Slow, writhing movements that are often repetitive, sinuous, and rhythmic.
Chorea: Irregular movements that are not repetitive or rhythmic, and tend to be more jerky and shaky.
Choreoathetoid: A combination of chorea and athetosis. These movements are irregular, but involves twisting and curving.
Dystonia: Involuntary movements followed by an abnormal, sustained posture.
Ataxic/Ataxia: Does not produce involuntary movements, but indicates impaired balance and coordination.