Evaluation of Myoelectric Activity of Paraspinal Muscles in Adolescents with Idiopathic Scoliosis during Habitual Standing and Sitting

Table 3

Mean of RMS sEMG ratio values (±) of the paraspinal muscles of subjects during habitual standing and sitting.

PUMC type	Concave side	=	Muscle region	Mean RMS EMG ratio (±)
				Habitual standing	Suggested standing	Habitual sitting	Suggested sitting
Ia	Right (thoracic)	4	Trapezius	2.54 ± 1.95	4.22 ± 5.87	3.84 ± 3.95	3.16 ± 2.16
			Latissimus dorsi	2.00 ± 1.22	2.41 ± 1.64	2.22 ± 1.66	2.32 ± 2.06
			Erector spinae thoracic	1.87 ± 1.70	2.00 ± 1.49	2.83 ± 2.69	2.51 ± 2.68
			Erector spinae lumbar	1.70 ± 0.85	3.05 ± 2.45	3.50 ± 4.88	2.66 ± 2.92
Ib	Left (thoracolumbar)	2	Trapezius	0.34 ± 0.16	0.48 ± 0.47	0.38 ± 0.08	0.53 ± 0.19
			Latissimus dorsi	0.90 ± 0.53	0.60 ± 0.15	0.83 ± 0.20	0.75 ± 0.28
			Erector spinae thoracic	0.87 ± 0.14	0.99 ± 0.67	1.84 ± 0.43	1.34 ± 0.74
			Erector spinae lumbar	0.30 ± 0.29	0.91 ± 0.43	0.91 ± 0.97	1.03 ± 0.97
IIc	Right (thoracic)		Trapezius	2.73 ± 1.76	3.76 ± 4.87	2.39 ± 1.63	1.96 ± 0.94
		7	Latissimus dorsi	2.46 ± 2.90	1.79 ± 1.76	1.97 ± 2.63	2.50 ± 3.88
	Left (lumbar)		Erector spinae thoracic	1.36 ± 1.14	1.10 ± 0.67	1.48 ± 1.35	1.35 ± 1.26
			Erector spinae lumbar	1.21 ± 0.59	1.01 ± 0.65	1.21 ± 1.25	1.22 ± 1.55