Me. Wiley et Dl. Damiano, LOWER-EXTREMITY STRENGTH PROFILES IN SPASTIC CEREBRAL-PALSY, Developmental Medicine and Child Neurology, 40(2), 1998, pp. 100-107
Although weakness has been identified in cerebral palsy (CP) in isolat
ed muscle groups, the magnitude of weakness in multiple muscles and th
e patterns of weakness across joints have not been documented. The max
imum voluntary contraction of eight muscle groups in the lower extremi
ties of 15 children with spastic diplegia, 15 with spastic hemiplegia,
and 16 age-matched peers was determined using a hand-held dynamometer
. Children with spastic diplegia were shown to be weaker than age-matc
hed peers in all muscles tested, as were the children with hemiplegia
on the involved side, with strength differences also noted on the unin
volved side. Weakness was more pronounced distally in the groups with
CP, and the hip flexors and ankle plantarflexors in spastic CP tended
to be relatively stronger than their antagonists as compared with the
strength ratios of the comparison group. In conclusion, children with
spastic CP demonstrate quantifiable lower-extremity weakness and muscl
e imbalance across joints.