Approximately 2-2.5 per thousand children born in the western world have<unk>  palsy, with increasing incidence in twin and premature births.<unk>  accounts for 5 to 10% of all cases. The cause of<unk>  palsy, in particular its<unk>  subtype is unknown, but thought to be due to malformation or damage in the cerebellum and its many connections,. The majority of cases that present malformation of the cerebellum are congenital, however acquired<unk>  can result from meningitis, trauma, birth complications, and encephalopathies (septic, acute, disseminated, and toxic). In addition, maternal viral infections may cause damage to the fetal brain due to increase in inflammatory cytokines produced during infection. Brain injury can occur during prenatal, perinatal, or postnatal periods. Most cases of<unk>  palsy, approximately 80%, are acquired prenatally from unknown causes. Incidence increases with decreasing gestational period—fewer than 32 weeks of gestation and birth weight less than 5 Ib 8 oz or 2500g.
Ataxic cerebral palsy
Athetoid cerebral palsy
Infantile progressive bulbar palsy
Dyskinetic cerebral palsy
Spinal and bulbar muscular atrophy
Oculopharyngeal muscular dystrophy
Spastic cerebral palsy
Periodic paralysis