Intrathecal movement and tension of the lumbosacral roots induced by straight-leg raising

American Journal of Physical Medicine & Rehabilitation
Hyun-Yoon KoHyun Choong Lee

Abstract

To obtain quantitative biomechanical data on the effects of different angles of straight-leg raising on intrathecal movements and tensions in the lumbosacral nerve roots in human cadavers. Eight embalmed human cadavers with no gross spinal pathology and no limitations in hip motion were used. We performed reverse straight-leg raising by hanging the left leg down from the table with the knee extended while measuring the movement and tension of nerve roots L2, L3, L4, L5, and S1 in 10-degree intervals for straight-leg raising from 0 to 70 degrees. The mean intrathecal movements at 70 degrees were 0.55 mm, 0.54 mm, 0.96 mm, 1.54 mm, and 2.31 mm for roots L2, L3, L4, L5, and S1, respectively. The movements were statistically significant at >50 degrees for root L5 and at >40 degrees for root S1 (P < 0.05). The tension in the nerve roots with increasing angle of straight-leg raising increased from roots L2 to S1. The mean tensions at 70 degrees of straight-leg raising were 141.25 g, 168.75 g, 228.75 g, 280.00 g, and 493.75 g for roots L2, L3, L4, L5, and S1, respectively. The difference in tension was significant at >70 degrees for roots L2, L3, and L4 roots, at >40 degrees for root L5 root, and at >10 degrees for root S1 (P < 0.05)....Continue Reading

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Citations

Feb 16, 2013·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·M Farshad, K Min
Apr 14, 2009·Journal of Manipulative and Physiological Therapeutics·Jeremy Walsh, Toby Hall
Jun 1, 2007·Journal of Chiropractic Medicine·Kenneth Jeffrey Miller
Jun 15, 2011·Clinical Anatomy : Official Journal of the American Association of Clinical Anatomists & the British Association of Clinical Anatomists·Mehmet ArslanHasan Çağlar Uğur
Dec 3, 2014·The Spine Journal : Official Journal of the North American Spine Society·Ta-Wei TaiI-Ming Jou
Sep 5, 2017·Journal of Back and Musculoskeletal Rehabilitation·Tibor SzikszayHarry von Piekartz
Oct 18, 2020·Journal of Orthopaedic Surgery and Research·Qinghao ZhaoBenchao Shi

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