Gait strategy of uninvolved limb in children with spastic hemiplegia.

AIM: The aim of this study is the gait pattern quantification in hemiplegic children with cerebral palsy using 3D Gait Analysis (GA), in order to distinguish kinematic and kinetic features of involved and uninvolved limbs.

METHODS: Gait pattern of 28 hemiplegic children and 10 healthy children was quantified using GA. Spatial/temporal parameters, kinematic and kinetic parameters of the main joints of lower limbs were identified and calculated.

RESULTS: In hemiplegic patients the gait pattern of uninvolved limbs was found to be different from those of involved limbs and of control group. The uninvolved limbs were characterized by significant longer stance phase, than involved limbs and healthy children. The main differences in kinematics were found at proximal joints: knee joint was more flexed than normality range during most of gait cycle and hip presented high flexion at the beginning of stance and in the swing phase. Ankle kinematics presented values closed to normative data, even if anomalous pattern was generally present. In term of ankle kinetics, excessive absorbed ankle power in the first phase of stance was found and ankle power generation revealed the mean value of its maximum to be closed to normative.

CONCLUSION: Analysis of kinematic and kinetic parameters indicated that uninvolved limb of hemiplegic children generally presents a unique motor strategy, different from the involved limb and healthy group. Its gait pattern may be related to the search of a better stability in order to optimize gait and it may be a consequence of involved limb strategy due to the pathology.