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  • Title: Is spinal neuromuscular function asymmetrical in adolescents with idiopathic scoliosis compared to those without scoliosis?: A narrative review of surface EMG studies.
    Author: Ng PTT, Claus A, Izatt MT, Pivonka P, Tucker K.
    Journal: J Electromyogr Kinesiol; 2022 Apr; 63():102640. PubMed ID: 35219074.
    Abstract:
    Adolescent idiopathic scoliosis (AIS) is a three-dimensional spinal deformity occurring between ages of 10-18 years. We aimed to present a reasoned synthesis of the published evidence for and against asymmetrical paraspinal muscle activation in AIS. PubMed and Embase databases were searched using terms: adolescent idiopathic scoliosis AND electromyogra* (EMG). Identified studies (n = 94) were screened for eligibility. We identified 16 studies, from which 136 EMG outcome measures contributed to the review. For EMG onset, one of two studies provided evidence of earlier muscle activation on the convex compared to concave side of the spine, particularly in those with progressive AIS. For EMG amplitude, 43 outcome measures provided evidence of convex > concave activation, 85 outcomes supported no difference between sides, and 8 outcomes supported concave > convex activation. Greater activity on the convex than concave side was more commonly demonstrated at the scoliosis curve apex level, in people with single right thoracic [progressive] curves, during postural tasks. Further research is needed to determine the relationships between muscle activity asymmetry and spinal curve parameters in a variety of motor tasks. Recommendations are provided to improve methodological quality for future studies of spinal neuromuscular function in AIS, as well as more comprehensive and transparent reporting of methods and results.
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