Delayed onset of electromyographic activity of vastus medialis obliquus relative to vastus lateralis in subjects with patellofemoral pain syndrome

2001 ◽  
Vol 82 (2) ◽  
pp. 183-189 ◽  
Author(s):  
Sallie M. Cowan ◽  
Kim L. Bennell ◽  
Paul W. Hodges ◽  
Kay M. Crossley ◽  
Jenny McConnell
Keyword(s):  
Vastus Lateralis ◽  
Pain Syndrome ◽  
Patellofemoral Pain Syndrome ◽  
Patellofemoral Pain ◽  
Electromyographic Activity ◽  
Vastus Medialis ◽  
Vastus Medialis Obliquus ◽  
Delayed Onset

scholarly journals Dose atrophy of vastus medialis obliquus and vastus lateralis exist in patients with patellofemoral pain syndrome

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Conglei Dong ◽  
Ming Li ◽  
Kuo Hao ◽  
Chao Zhao ◽  
Kang Piao ◽  
...  
Keyword(s):  
Vastus Lateralis ◽  
Pain Syndrome ◽  
Patellofemoral Pain Syndrome ◽  
Patellofemoral Pain ◽  
Control Group ◽  
Vastus Lateralis Muscle ◽  
Vastus Medialis ◽  
Muscle Area ◽  
Vastus Medialis Obliquus ◽  
Lateralis Muscle

Abstract Background Whether vastus medialis obliquus atrophy exists in patients with patellofemoral pain syndrome and whether the amount of atrophy differs between the vastus medialis obliquus and vastus lateralis muscles remain unknown. Materials From June 2016 to March 2019, 61 patients with patellofemoral pain syndrome were retrospectively included in the study group, and an age-, sex-, and body mass index-matched cohort of 61 patients with normal knees was randomly selected as the control group. All enrolled subjects had undergone CT scans in the supine position. The cross-sectional areas of the vastus medialis obliquus and the vastus lateralis muscle in the sections 0, 5, 10, 15, and 20 mm above the upper pole of the patella were measured, and the vastus medialis obliquus/vastus lateralis muscle area ratio was evaluated. Results In the study group, the vastus medialis obliquus areas and the vastus lateralis muscle areas in the sections that were 0, 5, 10, 15, and 20 mm above the upper pole of the patella were significantly smaller than the respective areas in the control group (P < 0.05). The vastus medialis obliquus/vastus lateralis muscle area ratio was significantly smaller at the upper pole of the patella (the section 0 mm above the upper pole of the patella) than the corresponding ratio in the control group (P < 0.05). No significant difference was noted between the two groups in the sections 5, 10, 15, and 20 mm above the upper pole of the patella (P > 0.05). Conclusion In patients with patellofemoral pain syndrome, vastus medialis obliquus and vastus lateralis muscle atrophy existed in sections 0–20 mm above the upper pole of the patella, compared with normal controls, and atrophy of the vastus medialis obliquus was more evident than that of the vastus lateralis muscle at the upper pole of the patella. These findings support the rationale for the use of general quadriceps exercise combined with vastus medialis obliquus strengthening exercise as part of the rehabilitation programme for the patients with patellofemoral pain syndrome.

Vastus Medialis Obliquus and Vastus Lateralis Activity in Patients with and without Patellofemoral Pain Syndrome

1997 ◽  
Vol 6 (1) ◽  
pp. 1-10 ◽  
Author(s):  
John P. Miller ◽  
Daniel Sedory ◽  
Ronald V. Croce
Keyword(s):  
Knee Flexion ◽  
Vastus Lateralis ◽  
Pain Syndrome ◽  
Patellofemoral Pain Syndrome ◽  
Patellofemoral Pain ◽  
Vastus Medialis ◽  
Kinetic Chain ◽  
Vastus Medialis Obliquus ◽  
Closed Kinetic Chain ◽  
Step Down

The purpose of this study was to examine the efficacy of closed kinetic chain exercises in preferentially recruiting the oblique fibers of the vastus medialis obliquus (VMO). Fifteen athletically active females, 6 with patellofemoral pain syndrome (PFPS) and 9 without PFPS, performed two isometric and two dynamic closed kinetic chain exercises. The isometric exercises were a static lunge with 30° of knee flexion (SL@30°) and with 70° of knee flexion (SL@70°). The dynamic exercises were a step-up/step-down exercise (SUSD) and a modified wall slide (MWS). Selective recruitment of the VMO occurred during the MWS (p <.05) and the SUSD in the subjects without PFPS (p <.05). For the SL@70° (p <.01), the MWS (p <.01), and the SUSD (p <.05), subjects with PFPS had greater activity of the vastus lateralis (VL), resulting in a lower VMO: VL ratio for those exercises (p < .05). It was concluded that the closed kinetic chain exercises examined in this study do not preferentially recruit the VMO in individuals with PFPS. In addition, individuals with PFPS have a lower VMO:VL ratio during these exercises compared to individuals without PFPS.

Evaluating electromyographic activity of vastus medialis obliqus, vastus lateralis, and hamstrings in women with patellofemoral pain syndrome

2020 ◽  
Author(s):  
Mahsa Mazaheri ◽  
Alireza Motealleh ◽  
sobhan sobhani ◽  
amin kordi yoosefinejad
Keyword(s):  
Healthy Subjects ◽  
Vastus Lateralis ◽  
Pain Syndrome ◽  
Patellofemoral Pain Syndrome ◽  
Patellofemoral Pain ◽  
Emg Activity ◽  
Tibial Rotation ◽  
Electromyographic Activity ◽  
Vastus Medialis ◽  
Significant Difference

Abstract Background: Temporal difference in activation of medial-lateral hamstrings could lead to external tibial rotation. It was assumed that patients with patellofemoral pain syndrome (PFPS) exhibit altered medial-lateral hamstrings muscular pattern during functional tasks. Objectives: The aim of this study was to compare the electromyography (EMG) activity of quadriceps and hamstrings in patients with PFPS and healthy subjects during stair descending. Design: cross sectional comparative study Setting: Motion analysis Lab, Rehabilitation research center, Shiraz University of Medical Sciences Participants: 24 women with PFPS and 24 healthy subjects, aged 18-40 years recruited through convenience sampling method participated in this study. Interventions: The EMG activity of vastus medialis obliqus (VMO), vastus lateralis (VL), medial (MH) and lateral hamstrings (LH) recorded during stair descending. Main outcome measures: Onset latency and intensity of muscle activity measured relative to the moment of foot contact. Results: There were statistically significant difference in onset of hamstrings heads (LH-MH) between groups (p=0.014). The BF activated before ST in PFPS group. Normalized muscular activity was significantly reduced for VMO (p=0.002), VL (p=.045), and LH (p=0.019) in PFPS patients. Conclusions: Difference in temporal activation patterns of BF and ST may result in lack of rotational knee stabilization and lead to increased patellofemoral joint pressure. Earlier activation of LH rotates tibia externally, and hence, produced lateral patellar tracking.

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