Botulinum Toxin (known commercially as Botox) has shown promise in treating various musculoskeletal disorders. It does not offer a cure for the various disorders, but rather a way to control or limit the symptoms.
Since a lot of people who have cerebral palsy have a difficult time controlling various muscles, doctors and looking into the benefits of Botulinum Toxin (and it's muscle paralyzing effects) in helping to increase control over their bodies.
I've provided links to current research which involves both Botulinum Toxin and cerebral palsy.