Thesis (M.Sc.) - Cairo University - Faculty of Physical Therapy - Department of Musclosbeletal Disorders

Objective: This study was conducted to investigate the relationship between the amplitude of posterior oblique sling muscles; ipsilateral gluteus maximus (GM) and contralateral latissmus Dorsi (LD), and the amount of anterior translation of humeral head (ATHH) of the contralateral glenohumeral joint (GHJ) in subjects with unilateral chronic low back pain (CLBP) during ipsilateral prone knee extension (PHE) test.Methods: The study was conducted on thirty subjects (15 patients with CLBP and 15 healthy subjects). Ipsilateral GM and contralateral LD amplitude was recorded by surface EMG during PHE of the limb at the painful side and correlated to ATHH of contralateral GHJ as measured by ultrasonography.Results:There was statistically non-significant difference between RMS of GM value, LD value and ATHH value between both groups. There was non-significant correlation between EMG amplitude of each muscle and ATHH of contralateral GHJ. Conclusion: The assessment of ATHH, the amplitude of ipsilateral GM and contralateral LD during PHE of the limb at the painful side did not discriminate individuals with and without chronic low back pain. Although results did not reveal significant difference regarding our tested hypotheses, there was a trend toward ipsilateral GM hyperactivity and increase in ATHH of contralateral GHJ. ATHH of the contralateral GHJ wasn{u2019}t related to EMG activity of ipsilateral GM and contralateral LD

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