Yen-Hua Chen1, Huei-Ming Chai2, Yio-Wha Shau3, Chung-Li Wang4, Shwu-Fen Wang5. 1. Division of Physical Therapy, Department of Physical Medicine and Rehabilitation, National Taiwan University Hospital, Hsin-Chu Branch, HsinChu, Taiwan. 2. School and Graduate Institute of Physical Therapy, College of Medicine, National Taiwan University, Taipei, Taiwan; Center of Physical Therapy, National Taiwan University Hospital, Taipei, Taiwan. 3. Institute of Applied Mechanics, College of Engineering, National Taiwan University, Taipei, Taiwan. 4. Department of Orthopedic Surgery, National Taiwan University Hospital, Taipei, Taiwan. Electronic address: chungli@ntu.edu.tw. 5. School and Graduate Institute of Physical Therapy, College of Medicine, National Taiwan University, Taipei, Taiwan. Electronic address: sfwang@ntu.edu.tw.
Abstract
PURPOSE: Recent evidence suggested the significance of integrity of the tension balance of the muscle-fascia corset system in spinal stability, particularly the posterior musculofascial junction which is adjacent to dorsal located paraspinal muscles joining each other at lateral raphe (LR). The purpose of this study was to compare the contraction of the transversus abdominis (TrA) at both anterior and posterior musculofascial muscle-fascia junctions in patients with low back pain (LBP) and asymptomatic participants before and immediately after a sustained manual pressure to LR. METHODS: The present observational cohort study used a single-instance, test-retest design. The outcome variables included the resting thickness (Tr), the thickness during contraction (Tc), change in thickness (ΔT), sliding of musculofascial junction (ΔX), muscle length at rest (L) and displacement pattern (ΔD) of the TrA using ultrasonography. Vertical tolerable pressure at the LR was applied manual for 1 min. Tr, Tc, ΔT, and ΔX were analyzed by three-way ANOVA (musculofascial junction sites*group* pre-post manual release). ΔL and ΔD were analyzed by two-way ANOVA (group* pre-post manual release). RESULTS: Participants with LBP revealed less Tc, ΔT and ΔX at both sites (p < 0.005). After myofascial release, LBP group demonstrated a positive ΔD of the musculofascial junctions at both end (p < 0.001). Nevertheless, both groups increased the ΔT and ΔX at both sites (p < 0.001 and 0.001, respectively). CONCLUSION: The result indicated immediately effect of sustained manual pressure on musculofascial junction of TrA and supported the concept that the possible imbalanced tension of the myofascia corset of TrA in patients with LBP.
PURPOSE: Recent evidence suggested the significance of integrity of the tension balance of the muscle-fascia corset system in spinal stability, particularly the posterior musculofascial junction which is adjacent to dorsal located paraspinal muscles joining each other at lateral raphe (LR). The purpose of this study was to compare the contraction of the transversus abdominis (TrA) at both anterior and posterior musculofascial muscle-fascia junctions in patients with low back pain (LBP) and asymptomatic participants before and immediately after a sustained manual pressure to LR. METHODS: The present observational cohort study used a single-instance, test-retest design. The outcome variables included the resting thickness (Tr), the thickness during contraction (Tc), change in thickness (ΔT), sliding of musculofascial junction (ΔX), muscle length at rest (L) and displacement pattern (ΔD) of the TrA using ultrasonography. Vertical tolerable pressure at the LR was applied manual for 1 min. Tr, Tc, ΔT, and ΔX were analyzed by three-way ANOVA (musculofascial junction sites*group* pre-post manual release). ΔL and ΔD were analyzed by two-way ANOVA (group* pre-post manual release). RESULTS:Participants with LBP revealed less Tc, ΔT and ΔX at both sites (p < 0.005). After myofascial release, LBP group demonstrated a positive ΔD of the musculofascial junctions at both end (p < 0.001). Nevertheless, both groups increased the ΔT and ΔX at both sites (p < 0.001 and 0.001, respectively). CONCLUSION: The result indicated immediately effect of sustained manual pressure on musculofascial junction of TrA and supported the concept that the possible imbalanced tension of the myofascia corset of TrA in patients with LBP.
Authors: A Wayne Johnson; Lauren Adams; Jade B Kho; Daniel M Green; Nicolas B Pace; Ulrike H Mitchell Journal: BMC Musculoskelet Disord Date: 2021-03-17 Impact factor: 2.362
Authors: Samuel Fernández-Carnero; Carlos Martin-Saborido; Alexander Achalandabaso Ochoa-Ruiz de Mendoza; Alejandro Ferragut-Garcias; Juan Nicolás Cuenca-Zaldivar; Alejandro Leal-Quiñones; Cesar Calvo-Lobo; Tomas Gallego-Izquierdo Journal: J Clin Med Date: 2021-12-03 Impact factor: 4.241