To determine the effect of neutral pelvic alignment on postural tonus in the adductor muscle group in cerebral palsy
The purpose of this study was to determine if neutral pelvic alignment of children with spastic cerebral palsy reduced myoelectric activity in the adductor muscle group in the sitting position. This study used eight children in a one-group pre-test/post-test design to compare the myoelectric activity of the hip adductors via surface electrodes for two pelvic positions. Recordings for each child were taken using a Relax Pac biofeedback monitor after sitting in each position for thirty seconds, five minutes, and ten minutes. The usual posture of these eight children included a posteriorly tilted pelvis and increased kyphosis with increased muscle tone in the lower extremities. Sitting in this position in a Rifton Toddler Chair was used as the pre-test position. The treatment position tested was with the pelvis held in neutral alignment by a pelvic cross strap device.
Based on results of the Distribution-Free Signed Rank Test (Wilcoxon), it was concluded that a significant reduction in myoelectric activity occurred when the child was positioned with the pelvis in neutral alignment and maintained with a pelvic positioning device. (Abstract shortened by UMI.)