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- W2468407425 abstract "Neuromuscular dysfunction of the lumbo-pelvic muscles may contribute to recurring episodes of low back pain (LBP). Ultrasound imaging is a noninvasive way to assess muscle function in real-time, but has primarily focused on individual muscles during unloaded positions. Multiple measurements across muscles during functional positions may better identify individuals with and without a history of LBP. PURPOSE: To compare lumbo-pelvic muscle function between individuals with and without a history of LBP across four positions. METHODS: Ultrasound images at rest and during an abdominal drawing-in maneuver (ADIM) were obtained for the transversus abdominis (TrA) and lumbar multifidus (LM) bilaterally in 32 individuals (16 Healthy (H): 16 LBP, age 23±7 years, BMI 23.3±2.5 kg/m2) while lying on a table, seated, standing, and walking. Combined and composite activation ratios (AR) were calculated for each position. Combined AR were defined as the total contracted (ADIM) thickness of all four measurements over the total resting thickness for all measures, while the composite AR was expressed as the averaged AR of the four independent TrA and LM AR for each position. RESULTS: Individuals with a history of LBP had smaller composite AR in the standing position (H: 1.13±.09, LBP: 1.07±.10, p=0.047, Effect Size=-.63, 95% confidence interval (95%CI)(-1.34-.08), but not in the table (H: 1.24±.20, LBP 1.18±.16, p=0.468), seated (H: 1.12±.11, LBP: 1.08±.09, p=0.270) or walking positions (H: 1.12±.09, LBP 1.15±.12, p=0.196). No group differences were observed for the combined AR in any of the positions (Table: H: 1.06±.06, LBP: 1.05±.06, p=0.867; seated H: 1.03±.04, LBP: 1.02±.04, p=.780; standing H: 1.03±.03, LBP: 1.02±.04, p=0.111; walking H: 1.02±.04, LBP: 1.04±.04, p=0.128). Receiver operating characteristic analysis identified the ability to distinguish between individuals with and without a history of LBP in the standing position (Area=.707, standard error .094, 95%CI (.523-.891), p=.046, sensitivity .688, specificity .750). CONCLUSION: A combination of TrA and LM ultrasound muscle function may be able to identify individuals with a history of LBP in a standing position. Assessing individuals with a history of LBP during functional positions may provide additional information regarding neuromuscular dysfunction." @default.
- W2468407425 created "2016-07-22" @default.
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- W2468407425 date "2015-05-01" @default.
- W2468407425 modified "2023-09-27" @default.
- W2468407425 title "Identifying Individuals With A History Of Low Back Pain Through Lumbo-pelvic Muscle Thickness Across Positions" @default.
- W2468407425 doi "https://doi.org/10.1249/01.mss.0000477117.36134.9a" @default.
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