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Activation pattern of lower extremity muscles in backward versus forward walking in patellofemoral pain syndrome / Alaa Amr Ahmed Mohamed ; Supervised Nagui Sobhi Nassif , Osama Ragaa Abdelraouf , Ayman Gouda Matar

By: Contributor(s): Material type: TextTextLanguage: English Publication details: Cairo : Alaa Amr Ahmed Mohamed , 2016Description: 113 P. : charts , facsimiles ; 25cmOther title:
  • نمط تفعيل عضلات الطرف السفلى فى المشى الى الخلف مقابل المشى الى الأمام فى متلازمة ألم رضفة الفخذ [Added title page title]
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Dissertation note: Thesis (M.Sc.) - Cairo University - Faculty of Physical Therapy - Department of Biomechanics Summary: Background: There is an increased popularity for using backward walking (BW) in the rehabilitation of patellofemoral pain syndrome (PFPS). Yet, little is known regarding the activation of hip and knee muscles during BW in patients with PFPS. Purpose: The purposes of this study were to compare the activation of knee extensors, hip abductors, and adductors in BW versus forward walking (FW) in patients with PFPS. In addition, to investigate the difference in activation of the tested muscles between both the PFPS and control groups during FW and BW. Methods: Sixteen females with PFPS and sixteen matched healthy controls participated in the study. The sample mean age was 20.88 ± 1.95 years. Surface EMGs from vastus medialis obliquus (VMO), vastus lateralis (VL), gluteus medius (GM), and adductor longus (AL) muscles were collected during FW and BW at a speed of 3 km/h using Myomonitor IV EMG System. Statistical analysis was performed using 2 x 2 mixed design MANOVA with the alpha level set at 0.05. Results: The PFPS group had significantly higher normalized root mean square values of VMO, VL, and GM muscles by 97.5%, 44.4%, and 34.6%, respectively, with no significant difference in AL activity during BW versus FW. Moreover, during FW, the PFPS group showed significantly higher activation of VMO, VL, and AL muscles compared to control group. Conversely, the EMG activity of GM was significantly lower during FW in the PFPS group. In addition, no significant difference in activation was found during BW between both groups, except for significantly higher AL activity in the PFPS compared to controls. Conclusion: BW improves the activation of hip abductors and knee extensors particularly the VMO in patients with PFPS. Consequently, the addition of BW to the rehabilitation of PFPS may be beneficial for correcting patellar malalignment resulting from hip or knee muscles imbalance
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Item type Current library Home library Call number Copy number Status Date due Barcode
Thesis Thesis قاعة الرسائل الجامعية - الدور الاول المكتبة المركزبة الجديدة - جامعة القاهرة Cai01.21.01.M.Sc.2016.Al.A (Browse shelf(Opens below)) Not for loan 01010110070012000
CD - Rom CD - Rom مخـــزن الرســائل الجـــامعية - البدروم المكتبة المركزبة الجديدة - جامعة القاهرة Cai01.21.01.M.Sc.2016.Al.A (Browse shelf(Opens below)) 70012.CD Not for loan 01020110070012000

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

Background: There is an increased popularity for using backward walking (BW) in the rehabilitation of patellofemoral pain syndrome (PFPS). Yet, little is known regarding the activation of hip and knee muscles during BW in patients with PFPS. Purpose: The purposes of this study were to compare the activation of knee extensors, hip abductors, and adductors in BW versus forward walking (FW) in patients with PFPS. In addition, to investigate the difference in activation of the tested muscles between both the PFPS and control groups during FW and BW. Methods: Sixteen females with PFPS and sixteen matched healthy controls participated in the study. The sample mean age was 20.88 ± 1.95 years. Surface EMGs from vastus medialis obliquus (VMO), vastus lateralis (VL), gluteus medius (GM), and adductor longus (AL) muscles were collected during FW and BW at a speed of 3 km/h using Myomonitor IV EMG System. Statistical analysis was performed using 2 x 2 mixed design MANOVA with the alpha level set at 0.05. Results: The PFPS group had significantly higher normalized root mean square values of VMO, VL, and GM muscles by 97.5%, 44.4%, and 34.6%, respectively, with no significant difference in AL activity during BW versus FW. Moreover, during FW, the PFPS group showed significantly higher activation of VMO, VL, and AL muscles compared to control group. Conversely, the EMG activity of GM was significantly lower during FW in the PFPS group. In addition, no significant difference in activation was found during BW between both groups, except for significantly higher AL activity in the PFPS compared to controls. Conclusion: BW improves the activation of hip abductors and knee extensors particularly the VMO in patients with PFPS. Consequently, the addition of BW to the rehabilitation of PFPS may be beneficial for correcting patellar malalignment resulting from hip or knee muscles imbalance

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