earticle

영어

We investigated abdominal and lower extremity muscle activity and thickness in typically developing children and children with develop-mental delays. A total of 35 children participated: typically developing peers (n=13), children with hypotonia (n=10), and children with spas-ticity (n=12). Muscle activity and thickness were measured at rest and during activity. Electromyography was used to measure abdominal and lower extremity muscle activities, and abdominal muscle thickness was measured using ultrasonography. There was a significant difference between the groups in the activity of the rectus abdominis and quadri-ceps muscles at rest and during activity (P<0.05). There was a signifi-cant difference between the groups in the thickness of the external oblique and transversus abdominis muscles during activity (P<0.05). There was a significant difference between the groups in the thickness of the external oblique and internal oblique muscles in the sitting posi-tion (P<0.05). Therefore, the characteristics of muscle tone should be considered when applying interventions to children with developmental delay.