Vastus medialis and lateralis activity during voluntary and stimulated contractions

Visscher, Rosa M. S.; Rodríguez‐Puyol, Diego; Friesenbichler, Bernd; Dohm-Acker, M; Rosenheck, Thomas; Maffiuletti, Nicola A.

doi:10.1002/mus.25542

Cited by 14 publications

(21 citation statements)

References 38 publications

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“…Our results provide important insights about the functional interpretation of the covariation between quadriceps muscle activity. Although previous studies have demonstrated a strong correlation between the activity of VM and VL (10,(41)(42)(43), the functional role of this correlation has not been clear. Since VM and VL have the same contribution to task variables and produce opposing mediolateral patellar forces (11), their strong correlation is consistent with both simplification of task performance (16,19) and regulation of internal joint stresses (41,44,45).…”

Section: Discussionmentioning

confidence: 84%

“…This strategy might simplify task performance by reducing the number of variables that need to be specified for the production of behavior. For example, the quadriceps muscles VL and VM have very similar contributions to task performance with each muscle producing a similar extension torque at the knee (9)(10)(11); in rats, which have knees that can move in both flexion/extension and pronation/supination, VM and VL produce similar actions along all degrees of freedom (11). Consistent with the proposal that covariation patterns reflect muscles' contribution to task performance (7,(12)(13)(14)(15), the activations of VM and VL are strongly correlated (15)(16)(17)(18), suggesting that the CNS might control VM and VL as a single functional unit to simplify the achievement of task goals (19).…”

mentioning

confidence: 99%

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Coordination amongst quadriceps muscles suggests neural regulation of internal joint stresses, not simplification of task performance

Alessandro

Barroso

Prashara

et al. 2020

Proc. Natl. Acad. Sci. U.S.A.

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Many studies have demonstrated covariation between muscle activations during behavior, suggesting that muscles are not controlled independently. According to one common proposal, this covariation reflects simplification of task performance by the nervous system so that muscles with similar contributions to task variables are controlled together. Alternatively, this covariation might reflect regulation of low-level aspects of movements that are common across tasks, such as stresses within joints. We examined these issues by analyzing covariation patterns in quadriceps muscle activity during locomotion in rats. The three monoarticular quadriceps muscles (vastus medialis [VM], vastus lateralis [VL], and vastus intermedius [VI]) produce knee extension and so have identical contributions to task performance; the biarticular rectus femoris (RF) produces an additional hip flexion. Consistent with the proposal that muscle covariation is related to similarity of muscle actions on task variables, we found that the covariation between VM and VL was stronger than their covariations with RF. However, covariation between VM and VL was also stronger than their covariations with VI. Since all vastii have identical actions on task variables, this finding suggests that covariation between muscle activity is not solely driven by simplification of overt task performance. Instead, the preferentially strong covariation between VM and VL is consistent with the control of internal joint stresses: Since VM and VL produce opposing mediolateral forces on the patella, the high positive correlation between their activation minimizes the net mediolateral patellar force. These results provide important insights into the interpretation of muscle covariations and their role in movement control.

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Section: Discussionmentioning

confidence: 84%

mentioning

confidence: 99%

Coordination amongst quadriceps muscles suggests neural regulation of internal joint stresses, not simplification of task performance

Alessandro

Barroso

Prashara

et al. 2020

Proc. Natl. Acad. Sci. U.S.A.

View full text Add to dashboard Cite

show abstract

“…Our results provide important insights about the functional interpretation of the co-variation between quadriceps muscle activity. Although previous studies have demonstrated a strong correlation between the activity of VM and VL [10,[29][30][31], the functional role of this correlation has not been clear. Since VM and VL have the same contribution to task variables and produce opposing mediolateral patellar forces [11], their strong correlation is consistent with both simplification of task performance [16,19] and regulation of internal joint stresses [29,32,33].…”

Section: Functional Role Of Muscle Co-variation In Quadricepsmentioning

confidence: 84%

“…This strategy might simplify task performance by reducing the number of variables that need to be specified for the production of behavior. For example, the quadriceps muscles vastus lateralis (VL) and vastus medialis (VM) have very similar contributions to task performance, with each muscle producing a similar extension torque at the knee [9][10][11]. Consistent with the proposal that co-variation patterns reflect muscles' contribution to task performance [7,[12][13][14][15], the activations of VM and VL are strongly correlated [15][16][17][18], suggesting that the CNS might control VM and VL as a single functional unit to simplify the achievement of task goals [19].…”

Section: Introductionmentioning

confidence: 99%

Coordination amongst quadriceps muscles suggests neural regulation of internal joint stresses, not simplification of task performance

Alessandro¹,

Prashara²,

Tentler³

et al. 2019

Preprint

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Many studies have demonstrated co-variation between muscle activations during behavior, suggesting that muscles are not controlled independently. According to one common proposal, this co-variation reflects simplification of task performance by the nervous system, so that muscles with similar contributions to task variables are controlled together. Alternatively, this co-variation might reflect regulation of low-level aspects of movements that are common across tasks, such as stresses within joints. We examined these issues by analyzing co-variation patterns in quadriceps muscle activity during locomotion in rats. The three mono-articular quadriceps muscles (vastus medialis, VM; vastus lateralis, VL; vastus intermedius, VI) produce knee extension and so have identical contributions to task performance; the bi-articular rectus femoris (RF) produces an additional hip flexion. Consistent with the proposal that muscle co-variation is related to similarity of muscle actions on task variables, we found that the co-variation between VM and VL was stronger than their co-variations with RF. However, co-variation between VM and VL was also stronger than their co-variations with VI. Since all vastii have identical actions on task variables, this finding suggests that co-variation between muscle activity is not solely driven by simplification of task performance. Instead, the preferentially strong covariation between VM and VL is consistent with the control of internal joint stresses: since VM and VL produce opposing mediolateral forces on the patella, the high positive correlation between their activation minimizes the net mediolateral patellar force. These results provide important insights into the interpretation of muscle co-variations and their role in movement control.

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“…lateral para a medial do músculo, levando à maior magnitude de ativação (Murray et al, 2013;Visscher et al, 2017). Em uma linha mais antiga e contrária, outros grupos de investigação não reportam diferenças significativas (p < 0,05) na ativação elétrica do VL durante as condições de rotações dos pés (Alkner, Tesch & Berg, 2000;Signorile et al, 1995).…”

Section: Resultsunclassified

Atividade eletromiográfica da musculatura do quadríceps associado às diferentes posições do pé: um estudo piloto

Loures¹,

Santos

Monteiro

et al. 2020

PensarMov.

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O fortalecimento do grupo muscular quadríceps femoral (QF) é muito importante devido sua função para o movimento. Mudanças na posição do pé, podem gerar alterações no recrutamento muscular, desta forma o presente estudo objetivou verificar se as variações nas posições dos pés, durante a extensão de joelhos, são eficazes para a seleção específica dos músculos reto femoral, vasto lateral e vasto medial, que compõem o QF. Onze mulheres universitárias (idade 22,36 ± 3,56 anos) participaram do estudo. Foi avaliada a ativação dos músculos através da eletromiografia de superfície, com configuração bipolar, em 3 séries de 10 repetições máximas (RM) de extensão de joelhos bilateral, em três posições dos pés: posição neutra, rotação interna e rotação externa. Os resultados não apontam diferenças significativas entre os músculos do QF superficial em todas as posições dos pés. Em conclusão, os resultados do presente estudo sugerem que as variações nos graus de rotação dos pés durante a extensão de joelhos, não são eficazes para a seleção específica dos músculos que compõem o QF.

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Vastus medialis and lateralis activity during voluntary and stimulated contractions

Abstract: These results can be explained by the relatively small contribution of the VM muscle to knee extension torque at short muscle length. Such disadvantage of the VM muscle at extended knee positions does not seem to be compensated by an increased neural drive. Muscle Nerve 56: 968-974, 2017.

Cited by 14 publications

References 38 publications

Coordination amongst quadriceps muscles suggests neural regulation of internal joint stresses, not simplification of task performance

Coordination amongst quadriceps muscles suggests neural regulation of internal joint stresses, not simplification of task performance

Coordination amongst quadriceps muscles suggests neural regulation of internal joint stresses, not simplification of task performance

Atividade eletromiográfica da musculatura do quadríceps associado às diferentes posições do pé: um estudo piloto

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