|8D20 Spastic cerebral palsy - characterized by increased muscle tone associated with hyperactive muscle stretch reflexes (deep tendon reflexes) and an increase in resistance to rapid muscle stretch. Extensor plantar responses are commonly present.
- 8D20.0 Spastic unilateral cerebral palsy - a form of cerebral palsy in which the spasticity is confined to one side; it is often accompanied by cortical sensory impairment and varying degrees of hemineglect, demonstrable by testing stereognosis and graphesthesia. Early hand preference is often the first sign of this disorder, and may be apparent in the first months of life.
- 8D20.1 Spastic bilateral cerebral palsy
- 8D21 Dyskinetic cerebral palsy - (extrapyramidal cerebral palsy) is characterized by impairment of voluntary movement because of the presence of interfering involuntary movements, and inappropriate co-contraction of agonist and antagonist muscles (dystonia). This group of disorders includes choreoathetotic cerebral palsy and dystonic cerebral palsy. The former is characterized by large amplitude, involuntary movements of mainly distal limbs(athetosis) with or without small amplitude, fleeting, asymmetric contractions of individual muscle groups (chorea). Dystonic cerebral palsy predominantly affects proximal trunk and limb muscles, which may show slow, persistent movements, leading to the adoption of unusual postures, such as torticollis.
- 8D22 Ataxic cerebral palsy - dominated by signs of cerebellar dysfunction, including hypotonia, ataxia, dysdiadochokinesis, dysmetria, dysarthria and nystagmus. Reflexes may be pendular, although there are often also signs of spasticity.
- 8D23 Worster-Drought syndrome - a form of cerebral palsy characterized by congenital pseudobulbar (suprabulbar) paresis manifesting as selective weakness of the lips, tongue and soft palate, dysphagia, dysphonia, drooling and jaw jerking.