New Insights into the Function of the Vastus Medialis with Clinical Implications

Toumi, Hechmi; Poumarat, G.; Benjamin, M.; Best, Thomas M.; F'Guyer, S.; Fairclough, John

doi:10.1249/01.mss.0b013e31804ec08d

Cited by 49 publications

(43 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Each exercise was repeated three times and exercises were separated by a 30 s rest period (Toumi et al, 2007). The performance order of the tests was determined using a random number table for all volunteers.…”

Section: Experimental Protocolmentioning

confidence: 99%

“…After careful preparation of the skin (Toumi et al, 2006(Toumi et al, , 2007 the electrode pairs were placed over the muscle belly of the respective muscles (Toumi et al, 2006(Toumi et al, , 2007. A reference electrode was placed over the patella.…”

Section: Emg Recordingsmentioning

confidence: 99%

“…Values of the root mean square (RMS) for each muscle and its contribution ratio expressed in percentage (100 * ([muscle RMS value] / sum of the RMS values of the three muscle tested) were calculated and stored for statistical analysis. Each muscle was represented by a percentage of its contribution to the total quadriceps EMG signal (Toumi et al, 2006(Toumi et al, , 2007. Muscle dysfunction as identified and non-symptomatic (c) leg.…”

Section: Emg Analysismentioning

confidence: 99%

See 2 more Smart Citations

The role of muscle strength & activation patterns in patellofemoral pain

Toumi

Best

Pinti

et al. 2013

Clinical Biomechanics

View full text Add to dashboard Cite

Section: Experimental Protocolmentioning

confidence: 99%

Section: Emg Recordingsmentioning

confidence: 99%

Section: Emg Analysismentioning

confidence: 99%

See 1 more Smart Citation

The role of muscle strength & activation patterns in patellofemoral pain

Toumi

Best

Pinti

et al. 2013

Clinical Biomechanics

View full text Add to dashboard Cite

“…They reported that in 45% of their pathological cohort one nerve branch was identified, whereas two branches were identified in 55% of their cohort. On further analysis, these differences in innervation were significantly correlated with the degree of Javadpour et al (1991) 15/15 1 in 100 Jojima et al (2004) 10/10 1 in 100 Lefebvre et al (2006) 17/39 1 in 44 22/39 2 in 56 Lieb and Perry (1968) 5/6 1 in 83 1/6 2 in 17 Nozic et al (1997) 50/50 2 in 100 Ono et al (2005) 2/2 2 in 100 Özer et al (2004) 20/20 2 in 100 Peeler et al (2005) 32/32 1 in 100 Thiranagama (1990) 30/30 2 in 100 Toumi et al (2007) 10/10 2 in 100 Weinstabl et al (1989) 115/115 1 in 100 a Studies assessing pathological knees. patellofemoral cartilaginous damage.…”

Section: Innervationmentioning

confidence: 99%

Do the vastus medialis obliquus and vastus medialis longus really exist? A systematic review

et al. 2008

View full text Add to dashboard Cite

There remains controversy over whether the vastus medialis (VM) is a single anatomical structure or whether it is composed of two separate portions, the vastus medialis longus (VML) proximally and the vastus medialis obliquus (VMO) distally. The objective of this study was to assess the evidence base of investigations into muscle fiber orientation, presence of a fibrofascial plane, and the innervation of the VM in human cadaver specimens and subjects. In addition to a hand search of specialist journals, an electronic search of AMED, British Nursing Index, CINAHL, the Cochrane database, EMBASE, ovid Medline, Pubmed, and Zetoc were performed from their inception to September 2008. All human subject papers assessing VM fiber orientation, presence of a fibrofascial plane, and the innervation of the VM where reviewed. Twenty-six papers, assessing 699 healthy knees, and 591 specimens with patellofemoral dysfunction were reviewed. The majority of nonpathological and pathological cases presented with a substantial alteration in fiber alignment seen between proximal and distal muscle portions of VM. Both cohorts presented with either one or two nerve branches to the VM. A fibrofascial plane dividing these two muscles was seen in a small proportion of both pathological and nonpathological knees. There was, however, insufficient good quality evidence to state whether the VM is composed of two separate components, the proximal VML and the distal VMO. Further study is recommended to evaluate the pathophysiological implications of such findings and to assess whether these correlate to functional electromyographic findings between the VML and VMO muscles.

show abstract

“…Outro fator associado é o posicionamento anatômico deste músculo, ou seja, o VM também apresenta uma pequena região de continuidade direta inserida no tendão patelar e não está somente inserido na borda medial da patela (Toumi et al, 2007). O papel do VL na estabilização da patela apresenta relevância pelo fato de estar localizado no septo lateral intermuscular unido à linha áspera do fêmur, consequentemente, fixado na borda supralateral da patela (Bevilaqua-Grossi, Monteiro-Pedro, Souza, Silva, & Bérzin, 2004).…”

Section: Atividade Electrica Do Vasto Lateral E Medial Com O Exercíciunclassified

Perfil do EMG em relação a duas angulações distintas durante a contracção voluntária isométrica máxima no exercício de agachamento

Maior¹,

Marmelo²,

Neto³

2011

Motricidade

View full text Add to dashboard Cite

RESUMOO objetivo do estudo foi verificar a atividade elétrica dos músculos vasto medial (VM) e do vasto lateral (VL) em duas angulações distintas (70° e 90° de flexão de joelho) durante a contração voluntária isométrica máxima (CVIM) realizada no exercício de agachamento. Foram selecionados 15 sujeitos do sexo masculino, voluntários e destreinados há mais de 12 meses em relação ao treinamento de força (idade: 28.0 ± 4.6 anos, estatura: 180.0 ± 5.2 cm, massa corporal: 80.0 ± 3.2 kg e IMC: 24.2 ± 1.6 kg/m²). Os sujeitos realizaram 3 CVIM com exercícios de agachamento a 70° e 90° de flexão de joelho. O protocolo de coleta de dados ocorreu em dois dias não consecutivos: 1º dia -mensurações antropométricas e realização de três CVIM a 70°; 2º dia -realização de três CVIM a 90°. Para a normalização dos dados foi adotada a média dos valores em RMS. Os procedimentos metodológicos seguiram as recomendações da ISEK. Os resultados não mostraram diferenças significativas (p > .05) entre as angulações para: VL 70° vs VM 70°; VL 90° vs VM 90°; VL 70° vs VL 90°; VM 70° vs VM 90°. Estes resultados permitem concluir existir um equilíbrio na atividade elétrica entre o vasto lateral e o vasto medial durante a realização das CVIM em sujeitos destreinados. Palavras-chave: EMG, agachamento, vasto medial, vasto lateral ABSTRACTThe aim of the present study was to analyze the electric activity of the vastus medialis (VM) and vastus lateralis (VL) in two differing angles (70° and 90° of knee flexion) during maximum voluntary contraction in squat exercise. Fifteen male subjects composed the sample of the study. As criteria they were untrained for more than 12 months (age of 28.0 ± 4.6 years, height of 180.0 ± 5.2 cm, weight of 80.0 ± 3.2 kg and body index mass of 24.2 ± 1.6 kg/m²). Subjects accomplished three maximum voluntary isometric contractions (MVIC) in squat exercise with 70° and 90° of knee flexion and separate at least in 72 h each. Data normalization occurred by average of values in RMS. Procedure adopted followed ISEK's recommendations. No significant differences (p > .05) were found between the angles VL 70° vs VM 70°, VL 90° vs VM 90°, VL 70° vs VL 90°, and VM 70° vs VM 90°. Results allowed for the conclusion that there seems to exist a balance in electric activity between VL and VM during MVIC with 70° and 90° of knee flexion in untrained subjects.

show abstract

New Insights into the Function of the Vastus Medialis with Clinical Implications

Abstract: VMO activity was pronounced during the weight-bearing conditions, with increased medial and lateral knee movements. This suggests that the VM should not be considered simply as a knee extensor or as a muscle whose main role is to maintain normal patellar tracking.

Cited by 49 publications

References 22 publications

The role of muscle strength & activation patterns in patellofemoral pain

The role of muscle strength & activation patterns in patellofemoral pain

Do the vastus medialis obliquus and vastus medialis longus really exist? A systematic review

Perfil do EMG em relação a duas angulações distintas durante a contracção voluntária isométrica máxima no exercício de agachamento

Contact Info

Product

Resources

About