Immediate effect of a wrist and thumb brace on bimanual activities in children with hemiplegic cerebral palsy

Abstract

Aim: The aim of this study was to determine the immediate effect of wearing a wrist and thumb brace on the performance of bimanual activities in children with spastic hemiplegic cerebral palsy.

Method: In a pre- and post-test cohort study of 25 children (age range 4-11y; mean age 8y 4mo [SD 2y 2mo]; 16 males, 9 females) with spastic hemiplegic cerebral palsy with a Zancolli classification hand score of I, IIA, or IIB (mild and moderate hand dysfunction; children with a Zancolli classification of III - severe hand dysfunction - were excluded from this study), performance of bimanual activities was evaluated with the Assisting Hand Assessment (AHA) on three occasions: one assessment with a static wrist and thumb brace placed on the affected hand and two other assessments without a brace. The differences between AHA scores obtained at the three assessments were evaluated using the repeated measures analysis of variance.

Results: Performance of bimanual activities while wearing the brace improved significantly compared to performance without the brace (p<0.001). With the brace, the mean AHA score increased by 3.2 (95% confidence interval 2.1-4.3) from 59.1 to 62.3. The scores of the two assessments without the brace did not differ significantly.

Interpretation: In children with spastic hemiplegic cerebral palsy, bracing of the wrist and thumb immediately improves spontaneous use of the affected upper limb in bimanual activities, possibly because bracing permits a more functional hand position.