Surface electromyography signal characteristics of lower limb muscles in children with unilateral developmental dysplasia of the hip

doi:10.5312/wjo.v17.i3.115251

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World Journal of Orthopedics

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2218-5836

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World J Orthop. Mar 18, 2026; 17(3): 115251
Published online Mar 18, 2026. doi: 10.5312/wjo.v17.i3.115251

Table 3 Comparison of surface electromyography signals of the affected and healthy lower limb muscles during walking in the 2 groups of children, median (25^th percentile-75^th percentile)

	Closed reduction group					Salter osteotomy group
	Affected side RMS	Healthy side RMS	RMS the ratio of the affected side to the healthy side	Affected side CCR	Healthy side CCR	Affected side RMS	Healthy side RMS	RMS the ratio of the affected side to the healthy side	Affected side CCR	Healthy side CCR
Tensor fasciae latae	35.71 (28.15-54.12)	31.60 (24.05-49.63)	1.06 (0.91-1.32)	0.78 (0.67-0.85)	0.78 (0.69-0.83)	49.31 (32.33-73.58)^a	44.17 (28.94-66.38)^a	1.21 (0.83-1.43)	0.82 (0.75-0.87)	0.78 (0.75-0.83)
Gluteus maximus	12.57 (6.61-17.96)	11.01 (6.73-16.73)	0.97 (0.86-1.11)	0.78 (0.67-0.85)	0.78 (0.69-0.83)	11.04 (6.52-15.75)	14.64 (7.44-18.98)	0.88 (0.75-1.14)	0.82 (0.75-0.87)	0.78 (0.75-0.83)
Rectus femoris	18.33 (14.44-27.31)	21.75 (15.57-28.71)	1.01 (0.77-1.14)	0.46 (0.37-0.52)	0.46 (0.37-0.56)	27.36 (19.24-37.04)^a	25.20 (17.81-28.91)	1.06 (0.82-1.59)	0.54 (0.46-0.65)^a	0.51 (0.38-0.56)
Hamstring muscles	23.77 (15.42-33.71)	23.57 (17.73-36.53)	0.95 (0.79-1.12)	0.46 (0.37-0.52)	0.46 (0.37-0.56)	22.81 (16.25-30.26)	22.64 (19.13-34.34)	0.87 (0.73-1.12)	0.54 (0.46-0.65)^a	0.51 (0.38-0.56)
Tibialis anterior muscle	38.44 (31.50-50.36)	37.43 (28.64-45.24)	1.02 (0.89-1.18)	0.48 (0.43-0.55)	0.47 (0.41-0.56)	39.05 (17.71-55.28)	39.07 (19.24-50.23)	0.99 (0.86-1.16)	0.53 (0.43-0.58)	0.54 (0.43-0.59)
Musculus gastrocnemius	37.43 (30.52-52.19)	39.00 (29.82-58.29)	0.99 (0.88-1.12)	0.48 (0.43-0.55)	0.47 (0.41-0.56)	34.57 (23.70-47.55)	36.65 (25.49-47.08)	1.05 (0.92-1.15)	0.53 (0.43-0.58)	0.54 (0.43-0.59)

^aP < 0.05 vs closed recovery group.

RMS: Root mean square; CCR: Co-contraction ratio.

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Citation: Li X, Ma SH, Gong HL, Wen J, Li FL, Xiao S. Surface electromyography signal characteristics of lower limb muscles in children with unilateral developmental dysplasia of the hip. World J Orthop 2026; 17(3): 115251
URL: https://www.wjgnet.com/2218-5836/full/v17/i3/115251.htm
DOI: https://dx.doi.org/10.5312/wjo.v17.i3.115251

Li X, Ma SH, Gong HL, Wen J, Li FL, Xiao S. Surface electromyography signal characteristics of lower limb muscles in children with unilateral developmental dysplasia of the hip. World J Orthop 2026; 17(3): 115251 [DOI: 10.5312/wjo.v17.i3.115251]

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