Inclusion Criteria:  Must have all of the following:  6-18 month-old infants with hemiplegia/motor asymmetry Must be able to participate in high intensity CIMT Gross Motor Function Classification System (GMFCS) level I-IV  Exclusion Criteria:  Must have none of the following:  GMFCS level V severe motor impairment/quadriplegic involvement uncorrected blindness or deafness cardiomyopathy