Relationship between vastus medialis Hoffmann reflex excitability and knee extension biomechanics during different tasks in women with patellofemoral pain

2021 ◽  
pp. 105544
Author(s):  
Marina Cabral Waiteman ◽  
Ana Flavia Balotari Botta ◽  
Vitória Ozores Perez ◽  
Danilo de Oliveira Silva ◽  
Marcella Ferraz Pazzinatto ◽  
...  
Keyword(s):  
Knee Extension ◽  
Patellofemoral Pain ◽  
Vastus Medialis ◽  
Hoffmann Reflex ◽  
Reflex Excitability

Vastus Medialis Hoffmann Reflex Excitability Is Associated With Pain Level, Self-Reported Function, and Chronicity in Women With Patellofemoral Pain

2017 ◽  
Vol 98 (1) ◽  
pp. 114-119 ◽  
Author(s):  
Danilo de Oliveira Silva ◽  
Fernando Henrique Magalhães ◽  
Nathálie Clara Faria ◽  
Deisi Ferrari ◽  
Marcella Ferraz Pazzinatto ◽  
...  
Keyword(s):  
Patellofemoral Pain ◽  
Vastus Medialis ◽  
Pain Level ◽  
Hoffmann Reflex ◽  
Reflex Excitability

scholarly journals Muscle Activation of Vastus Medialis Oblique and Vastus Lateralis in Sling-Based Exercises in Patients with Patellofemoral Pain Syndrome: A Cross-Over Study

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Wen-Dien Chang ◽  
Wei-Syuan Huang ◽  
Ping-Tung Lai
Keyword(s):  
Muscle Activation ◽  
Vastus Lateralis ◽  
Pain Syndrome ◽  
Patellofemoral Pain Syndrome ◽  
Knee Extension ◽  
Patellofemoral Pain ◽  
Voluntary Contraction ◽  
Vastus Medialis ◽  
Beneficial Effects ◽  
Knee Extension Exercise

Objectives. To examine what changes are caused in the activity of the vastus medialis oblique (VMO) and vastus lateralis (VL) at the time of sling-based exercises in patients with patellofemoral pain syndrome (PFPS) and compare the muscular activations in patients with PFPS among the sling-based exercises.Methods. This was a cross-over study. Sling-based open and closed kinetic knee extension and hip adduction exercises were designed for PFPS, and electromyography was applied to record maximal voluntary contraction during the exercises. The VMO and VL activations and VMO : VL ratios for the three exercises were analyzed and compared.Results. Thirty male (age = 21.19 ± 0.68 y) and 30 female (age = 21.12 ± 0.74 y) patients with PFPS were recruited. VMO activations during the sling-based open and closed kinetic knee extension exercises were significantly higher (P=0.04andP=0.001) than those during hip adduction exercises and VMO : VL ratio for the sling-based closed kinetic knee extension and hip adduction exercises approximated to 1.Conclusions. The sling-based closed kinetic knee extension exercise produced the highest VMO activation. It also had an appropriate VMO : VL ratio similar to sling-based hip adduction exercise and had beneficial effects on PFPS.

Motor Control of the Vastus Medialis Oblique and Vastus Lateralis Muscles is Disrupted during Eccentric Contractions in Subjects with Patellofemoral Pain

2002 ◽  
Vol 30 (4) ◽  
pp. 483-487 ◽  
Author(s):  
Tammy M. Owings ◽  
Mark D. Grabiner
Keyword(s):  
Vastus Lateralis ◽  
Clinical Importance ◽  
Normal Subjects ◽  
Knee Extension ◽  
Patellofemoral Pain ◽  
Eccentric Contractions ◽  
Vastus Medialis ◽  
Activation Patterns ◽  
Control Subjects ◽  
And Function

Background Inappropriate control of the vastus medialis oblique and vastus lateralis muscles by the central nervous system can contribute to maltracking of the patella. Hypothesis The activation timing and amplitude of the vastus medialis oblique and vastus lateralis muscles will be different between normal subjects and patients with patellofemoral pain. Study Design Controlled laboratory study. Methods Subjects with patellofemoral pain and asymptomatic control subjects performed maximum voluntary knee extension contractions initiated from a flexed and an extended position. The activation timing and amplitude of the vastus lateralis and vastus medialis oblique muscles were quantified from the recorded electromyographic signals. Results There were no between-group differences in activation timing. The activation amplitude of the vastus medialis oblique and vastus lateralis muscles of the patellofemoral pain subjects was altered to the greatest extent during eccentric contractions and differed significantly from that of control subjects. Conclusions The activation amplitudes of the vastus medialis oblique and vastus lateralis muscles of subjects with patellofemoral pain are consistent with a laterally tracking patella during eccentric contractions. Clinical Relevance The findings suggest the clinical importance of determining whether altered activation patterns are sensitive to rehabilitation, and, if so, if subjective reports of knee joint pain and function parallel changes in the activation patterns as a result of rehabilitation.

scholarly journals Patellar Tendon Reflex and Vastus Medialis Hoffmann Reflex Are Down Regulated and Correlated in Women With Patellofemoral Pain

2019 ◽  
Vol 100 (3) ◽  
pp. 514-519 ◽  
Author(s):  
Marcella Ferraz Pazzinatto ◽  
Danilo de Oliveira Silva ◽  
Amanda Schenatto Ferreira ◽  
Marina Cabral Waiteman ◽  
Evangelos Pappas ◽  
...  
Keyword(s):  
Patellar Tendon ◽  
Patellofemoral Pain ◽  
Vastus Medialis ◽  
Hoffmann Reflex ◽  
Tendon Reflex ◽  
Patellar Tendon Reflex

scholarly journals Exploratory study of electromyographic behavior of the vastus medialis and vastus lateralis at neuromuscular fatigue onset

2014 ◽  
Vol 20 (2) ◽  
pp. 213-220 ◽  
Author(s):  
Cristiano Rocha da Silva ◽  
Danilo de Oliveira Silva ◽  
Deisi Ferrari ◽  
Rúben de Faria Negrão Filho ◽  
Neri Alves ◽  
...  
Keyword(s):  
Exploratory Study ◽  
Vastus Lateralis ◽  
Knee Extension ◽  
Neuromuscular Fatigue ◽  
Isometric Contractions ◽  
Median Frequency ◽  
Vastus Medialis ◽  
Mean Square ◽  
Electromyographic Signal ◽  
The Moment

This study aimed to determine and analyze the neuromuscular fatigue onset by median frequency (MDF) and the root mean square (RMS) behavior of an electromyographic signal (EMG). Eighteen healthy men with no prior knee problems initially performed three maximum voluntary isometric contractions (MVIC). After two days of MVIC test, participants performed a fatiguing protocol in which they performed submaximal knee-extension contractions at 20% and 70% MVIC held to exhaustion. The MDF and RMS values from the EMG signals were recorded from the vastus medialis (VM) and the vastus lateralis (VL). Analysis of the MDF and RMS behavior enabled identification of neuromuscular fatigue onset for VM and VL muscles in 20% and 70% loads. Alterations between the VM and VL in the neuromuscular fatigue onset, at 20% and 70% MVIC, were not significant. These findings suggest that the methodology proposal was capable of indicating minute differences sensible to alterations in the EMG signals, allowing identification of the moment when the MDF and the RMS showed significant changes in behavior. The methodology used was also a viable one for describing and identifying the neuromuscular fatigue onset by means of the analysis of EMG signals.

scholarly journals The role of the quadriceps muscle in knee extension

1983 ◽  
Vol 39 (1) ◽  
pp. 13-14 ◽  
Author(s):  
Ellis S. Janks
Keyword(s):  
Quadriceps Muscle ◽  
Knee Extension ◽  
Vastus Medialis ◽  
Vastus Medialis Muscle

In 1949, Smillie proposed that the vastus medialis muscle alone is responsible for the final 10° to 15° of knee extension. A number of more recent studies have proved that the whole quadriceps muscle is responsible for all degrees of knee extension. This evidence is reviewed and the function of the two subdivisions of the vastus medialis is discussed.

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