Indian Journal of Physiotherapy & Occupational Therapy-An International Journal

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Comparison of VMO/VL Ratio in Patello-Femoral Pain Syndrome (PFPS) Patients: A Surface EMG Study


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1 Consultant Physiotherapist Wockhardt Hospital, Rajkot, India
     

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Background: PFPS describes anterior and retro patellar knee pain in the absence of other pathology. PFPS is one of the most common disorders of the knee accounts for 25% of knee injuries in sports medicine clinics. Prevalence rate is 20% in USA students and morbidity is directly related to activity of patients. EMG studies of normal subject have revealed that VMO /VL ratio is about 1:1 (power CM et al)

Objective: To study the VMO/VL ratio during ECCENTRIC, CONCENTRIC, ISOMETRIC exercise and Q-angle in PFPS patients and control groups.

Materials & Method: SUBJECTS; 25 diagnosed with PFPS and 25 asymptomatic control were recruited for study. EMG activity of VMO VL was recorded by surface electrodes.EMG data were analyzed in three activities for both groups, ISOMETRIC, CONCENTRIC and ECCENTRIC exercise. Outcome measure was EMG MUAP amplitude and Q-angle.

Results: Results showed that VMO/VL ratio is lower in PFPS subjects. And static and dynamic Qangle is higher for PFPS groups.

Conclusion: There was significant difference in VMO/VL ratio and Q-angle in both groups.


Keywords

VMO, Surface EMG, Q-angle
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  • Baquie P, Brukner P: Injuries presenting to an Australian sports medicine centre: A 12-month study. Clin J Sport Med 1995;7:28–31

  • Fulkerson JP, Arendt EA: Anterior knee pain in females. Clin Orthop 372: 69–73, 2000

  • Wilk KE ,Davies GJ, Mangine et al: patella femoral disorder, A classification system and clinical guidelines for non-operative rehabilitation ,j orthop physiotherapy 1998,28 : 307-22.

  • Powers CM , Mortensons , Nishimoto d,Simon D : criterion relaterd validity of clinical measurement to determine medial/lateral component of patella orientation, J orthop sports phys ther 1999; 29 : 372-377

  • Salaki N,Luo Z-P,Rand JA,An K-N: The influence of weakness in the i. vastus medialis oblique muscle on the patella femoral joint: an vitro ii. biomechanical study.clin biomech 2000;15:335- 339.

  • Mirzabeigi E,Jordan C,Groneley JK et al: Isolation of vastus medialis oblique muscle during exercise. Am J Sports Med 1999; 27: 50-53

  • Natri A, Kannus P, Jarvinen M. Which factors predict the longterm outcome in chronic patellofemoral pain syndrome? A 7-yr prospective follow-up study. Med Sci Sports Exerc 1998; 30 1572-7.

  • Blond L, Hansen L. Patellofemoral pain syndrome in athletes: a 5.7 year retrospective follow-up study of 250 athletes. Acta Orthop Belg 1998;64:393-400

  • Garrick JG: Anterior knee pain (chondromalacia patella). The physian and sports Medicine, 1989, 17: 75-84.

  • Powers CM, Landel DR perry J:timing and intensity of vastus muscle activity during functional activities in patients with and without patellofemoral pain.Phys Ther,1996,76:946-955

  • Miller JP,Sedory D,Croce RV:vastus medialis obliquus and vastus lateralis activity in patients with and without patellofemoral pain syndrome.J sports Rehabil,1997a,6:1-10.

  • Voight M, Weider D. Comparative reflex response times of the vastus medialis and the vastus lateralis in normal subjects and subjects with extensor mechanism dysfunction. Am J Sports Med 1991;10:131-7.

  • Witvrouw E, Sneyers C, Lysens R, Victor J, Bellemans M. Reflex response times of vastus medialis oblique and vastus lateralis in normal subjects with patellofemoral pain syndrome. J Orthop Sports Phys Ther 1996;24:160-5.

  • Braddom R. Physical medicine and rehabilitation. In: Casazza B,Young J, editors. Musculoskeletal disorders of the lower limbs 2nd ed. Philadelphia: WB Saunders; 2000. p 834-7.

  • Bechman M, Craig R, Lehman RC. Rehabilitation of patellofemoral dysfunction in the athlete. Clin Sports Med 1989;8:841-60.

  • Selina Lm Yip et al; Biofedfback supplementation to physiotherapy programme for rehabilitation of patellofemoral pain syndrome: Clinical Rehabilitation, Vol. 20, No. 12, 1050-1057 (2006)

  • Wild J , franklin T,woods W.patellar pain and quadriceps rehabilitation : an EMG study.Am J sports Med .1982; 10:12-15

  • Moller B, krebs B, Tidermand Dal c,aaris k, isometric contractions in the patella femoral pain syndrome.arch orthop trauma a surg,1986: 105: 24-27

  • Lam PL,Ng GYF: Activation of quadriceps muscle during semisquatting with different hip and knee positions in patients with anterior knee pain. Am J Phys Med Rehabil,2001,80:804-808


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  • Comparison of VMO/VL Ratio in Patello-Femoral Pain Syndrome (PFPS) Patients: A Surface EMG Study

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Authors

Nishant H. Nar
Consultant Physiotherapist Wockhardt Hospital, Rajkot, India

Abstract


Background: PFPS describes anterior and retro patellar knee pain in the absence of other pathology. PFPS is one of the most common disorders of the knee accounts for 25% of knee injuries in sports medicine clinics. Prevalence rate is 20% in USA students and morbidity is directly related to activity of patients. EMG studies of normal subject have revealed that VMO /VL ratio is about 1:1 (power CM et al)

Objective: To study the VMO/VL ratio during ECCENTRIC, CONCENTRIC, ISOMETRIC exercise and Q-angle in PFPS patients and control groups.

Materials & Method: SUBJECTS; 25 diagnosed with PFPS and 25 asymptomatic control were recruited for study. EMG activity of VMO VL was recorded by surface electrodes.EMG data were analyzed in three activities for both groups, ISOMETRIC, CONCENTRIC and ECCENTRIC exercise. Outcome measure was EMG MUAP amplitude and Q-angle.

Results: Results showed that VMO/VL ratio is lower in PFPS subjects. And static and dynamic Qangle is higher for PFPS groups.

Conclusion: There was significant difference in VMO/VL ratio and Q-angle in both groups.


Keywords


VMO, Surface EMG, Q-angle

References