Superficial and deep lumbar multifidus layers of asymptomatic individuals: intraday and interday reliability of the echo
- PDF / 788,856 Bytes
- 5 Pages / 595.276 x 790.866 pts Page_size
- 95 Downloads / 147 Views
ORIGINAL ARTICLE
Superficial and deep lumbar multifidus layers of asymptomatic individuals: intraday and interday reliability of the echo intensity measurement Elaine Mattos Senna Resende1 · Viviane Bastos de Oliveira2 · Wagner Coelho Albuquerque Pereira2 · Liliam Fernandes de Oliveira1,2 Received: 29 May 2019 / Revised: 14 July 2020 / Accepted: 17 August 2020 © Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Introduction Ultrasonography has been used to understand the functional and biomechanical aspects of the lumbar multifidus muscle in vivo. To characterize the multifidus echogenicity, the peculiarities of their superficial and deep layers must be considered. Purpose The present paper aimed to characterize the lumbar multifidus echo intensity (EI), in both superficial and deep layers, in ultrasonography images acquired in longitudinal and transversal orientations. Methods Evaluator obtained two images in each side of the lumbar of the volunteer, who was lying on prone position. Ultrasonography images were taken with probe in transversal and longitudinal orientations. EI was estimated by means average value of the grayscale distribution histogram, by extracting from region of interest of the superficial and deep layer. All participants returned for a second test day. Two-way MANOVA test was applied to compare EI measurements, considering layers and side factors. The reliability and variability were analyzed by the intraclass correlation coefficient and standard error measurements (SEM), respectively. Two-way MANOVA found significant difference between the layers in the transversal and longitudinal images, but not between the sides. Results Interdays reliability ranged of reasonable to excellent, and SEM values were lower than 17.08%. The superficial layer of the multifidus muscle showed higher EI values than the deeper one. Conclusions These analyses can serve as a basis for future studies approaching multifidus of the people with low back pain. Keywords Multifidus · Echo intensity · Deep · Superficial
Introduction The biomechanical role of the lumbar multifidus (MF) muscle is to stabilize the trunk during movements [1] and can be related to the two layers: superficial fibers, able to generate extensor torque, and deep fibers, closer to the vertebral rotation axis, more prompt to stability. Differences between these layers are studied in relation to activation and * Viviane Bastos de Oliveira [email protected] 1
Department of Biosciences, School of Physical Education and Sports, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
Biomedical Engineering Program, COPPE/Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
2
fiber-type proportion. Deep fibers are activated earlier than the superficial one [2, 3] and showed to have relative higher type I fibers (slow fibers) [4]. Differences in thickness between superficial and deep layers can be verified by ultrasonography [5], as well as the anatomical cross-sectional area and muscular architecture [6].
Data Loading...
