Intrathecal Baclofen and Pediatric Dystonia

Inclusion Criteria for pre-implant ITB subjects:

* Child must be large enough to have an ITB pump implanted (typically \~18 kg/4 years old)
* Child must be less than 21 years of age
* They have a diagnosis of CP
* Presence of dystonia verified with a documented Hypertonia Assessment Tool (HAT) and they must have a Barry-Albright Dystonia Scale (BADS) score \>14
* They have been identified by a physician for ITB treatment for tone management and the family/child have agreed to proceed with implantation; note: an ITB trial dose is not necessary to qualify.
* Child and family are willing to participate in full schedule of formal assessments, spanning pre-implantation, every 2 weeks until ideal intrathecal baclofen pump dosing is reached, and follow-up assessments

Inclusion Criteria for post-implant ITB subjects:

* Child must be less than 21 years of age
* They have a diagnosis of CP
* Presence of dystonia verified with a documented Hypertonia Assessment Tool (HAT) and they must have a Barry-Albright Dystonia Scale (BADS) score \>14
* Currently less than 12 months post ITB pump implant for tone management.
* Child and family are willing to participate in the 12-month outcome measure assessment.

Inclusion criteria for VDR subjects:

* Child must be less than 21 years of age
* They have a diagnosis of CP
* Presence of dystonia verified with a documented Hypertonia Assessment Tool (HAT)
* They have been identified by a physician as a candidate for VDR for tone management and the family/child have agreed to proceed with surgery.

Inclusion criteria for DBS subjects:

* Child must be less than 21 years of age
* They have a diagnosis of CP and have been identified by a physician as a candidate for DBS

Exclusion Criteria:

* Emergent need for ITB such as status dystonicus or paroxysmal sympathetic hyperactivity
* Botulinum injections within 3 months or phenol injections within 6 months
* Foster care placement or incarceration
* Family not willing to participate in schedule of assessments