Abstract
Magnetic resonance imagings of 91 children with hemiplegic cerebral palsy were analysed
with the aim of clustering their features into fairly homogeneous forms. In addition,
the different clinical patterns of each form were described. Four main types of lesion
were distinguished: form 1 (13 cases), which comprised brain malformations, form 2
(41 subjects), which grouped abnormalities of the periventricular white matter, form
3 (27 children), which was represented by cortical-subcortical lesions, and form 4
(10 subjects), which grouped non-progressive postnatal brain injuries. None of the
children had normal MRI and a high incidence of bilateral lesions was found, especially
in form 2. A left motor involvement was prevalent in the sample and was noted in all
but the third form. The severity of impairment was mainly moderate in forms 1 and
3, mild in the others. The upper limb was found to be more affected in all forms except
the second one, which presented a greater involvement of the lower limb. Mental retardation
occurred in about one-third of the children with forms 1 and 4, less often in the
other two. Seizures occurred in about half of the children with forms 1 or 3, while
the incidence was lower in forms 4 and 2. A strong correlation between the presence
of seizures and mental retardation was observed. The results of this study show the
importance of MRI in the evaluation of children with hemiplegic cerebral palsy.
Key words
MRI - Hemiplegia - Cerebral palsy
