ArticleEuropean spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society2025
Quantitative assessment of lumbar posterior anatomy on axial t2-weighted MR imaging: a comprehensive analysis of muscle-bone interval and spinous process muscle-ligaments complex.
Article in European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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9 authors.
Funding
Abstract
objectiveTo quantitatively evaluate the lumbar posterior anatomy, specifically the muscle-bone interval (MBI) and spinous process muscle-ligament complex, using magnetic resonance imaging (MRI) and investigate their clinical significance in surgical approaches.
methods140 patients (70 males and 70 females, aged 20 to 90 years) underwent lumbar spine MRI. Measurements of the MBI and spinous process, including length, width, height, and cross-sectional area, were taken at each lumbar level from L2 to L5 using ImageJ open-source software.
resultsThe MBI was confirmed along the midline plane of the spinous processes at the L2-L5 levels. The mean values for the MBI's length, width, height, and cross-sectional area were 20.43 ± 4.44 mm, 10.63 ± 3.18 mm, 12.81 ± 2.99 mm, and 77.57 ± 47.89 mm², respectively. Notably, multifidus muscle (MFM) decreases with age, while MBI increases, with males showing larger MFM and smaller MBI than females. These anatomical features exhibited a gradual increase from L2 to L5.
conclusionsWe identified the MBI as a significant anatomical space between the MFM, lamina, and the spinous processes, with its prominence increasing in the lower lumbar regions. The MBI expands with age, particularly its cross-sectional area, while the MFM cross-sectional area diminishes. These anatomical changes have notable implications for surgical approaches, including the potential refinement of posterior midline approaches to enhance muscle preservation and surgical outcomes.
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