Influence of contraction intensity, muscle, and gender on median frequency of the quadriceps femoris

2001 ◽  
Vol 90 (3) ◽  
pp. 804-810 ◽  
Author(s):  
Danny M. Pincivero ◽  
Robert M. Campy ◽  
Yuliya Salfetnikov ◽  
Ashley Bright ◽  
Alan J. Coelho
Keyword(s):  
Fiber Type ◽  
Vastus Lateralis ◽  
Morphological Variability ◽  
Power Spectral Analysis ◽  
Rectus Femoris ◽  
Quadriceps Femoris ◽  
Median Frequency ◽  
Power Spectral ◽  
And Gender ◽  
Voluntary Contractions

The purpose of this study was to assess the effects of contraction intensity, gender, and muscle on median frequency of the three superficial portions of the quadriceps femoris muscle. Thirty healthy volunteers were assessed for isometric electromyogram activity of the vastus medialis (VM), vastus lateralis (VL), and rectus femoris (RF) muscles with the knee at 60° flexion. Subjects performed 5-s isometric contractions at 10, 20, 30, 40, 50, 60, 70, 80, and 90% of the average of three maximal voluntary contractions. Median frequency ( fmed) of the three muscles was assessed through a power spectral analysis performed over 11 consecutive 512-ms epochs overlapping each other by one-half their length. The fmedfor each of the 11 epochs was then determined, followed by calculation of the mean and SD. The major findings of this study demonstrated that overall fmedwas significantly highest for the VL and lowest for the VM, whereas RF fmedwas between that of the other two muscles. Similar findings were observed for fmedvariability as the VL was significantly higher than the VM and RF, with no gender differences or differences between the latter two muscles. The results demonstrate that the largest change in fmedas a function of contraction intensity occurred for the VL in men (18.6%) and women (7.6%). These findings suggest that muscle fiber-type homogeneity may exist in the VM and RF, which displayed negligible changes in fmed, whereas the VL may possess greater morphological variability.

scholarly journals Test-retest reliability of electromyographic signal parameters used to evaluate neuromuscular fatigue in quadriceps femoris muscle

Kinesiology ◽  
2016 ◽  
Vol 48 (2) ◽  
pp. 174-181 ◽  
Author(s):  
Cristiano Rocha da Silva ◽  
Danilo de Oliveira Silva ◽  
Ronaldo Valdir Briani ◽  
Marcella Ferraz Pazzinatto ◽  
Deisi Ferrari ◽  
...  
Keyword(s):  
Vastus Lateralis ◽  
Rectus Femoris ◽  
Neuromuscular Fatigue ◽  
Median Frequency ◽  
Endurance Time ◽  
Retest Reliability ◽  
Emg Signal ◽  
Electromyographic Signal ◽  
Test Retest Reliability ◽  
Voluntary Contractions

The purpose of this study was to analyze the test-retest reliability of the median frequency (MDF) and root mean square (RMS) used to determine the onset of neuromuscular fatigue (NF) during sustained fatiguing contractions of the quadriceps. Eighteen healthy men were tested on two days, and electromyographic (EMG) signals were recorded from the vastus medialis (VM), rectus femoris (RF) and vastus lateralis (VL) during sustained isometric contractions at 20 and 70% of maximum voluntary contractions (MVC) held until exhaustion. The reliability of endurance time was excellent at 20% MVC and poor at 70% MVC. EMG variables were evaluated: (1) at the beginning of the test; (2) at NF; and (3) at the end of the test. The NF time values presented poor reliability. The MDF has shown, in general, poor reliability at 20 and 70% MVC, whereas the RMS reliability presented better results for both loads, especially for RF, followed by the VM and VL muscles. The MDF and RMS values extracted from NF showed poor reliability at 20 and 70% MVC, which suggests caution in using these variables extracted from the EMG signal to determine the onset of NF.

Muscle-specific atrophy of the quadriceps femoris with aging

2001 ◽  
Vol 90 (6) ◽  
pp. 2070-2074 ◽  
Author(s):  
T. A. Trappe ◽  
D. M. Lindquist ◽  
J. A. Carrithers
Keyword(s):  
Vastus Lateralis ◽  
Rectus Femoris ◽  
Quadriceps Femoris ◽  
Aging Research ◽  
Cross Sectional ◽  
Men And Women ◽  
Younger Women ◽  
Vastus Intermedius ◽  
Aging Men ◽  
Old Men

We examined the size of the four muscles of the quadriceps femoris in young and old men and women to assess whether the vastus lateralis is an appropriate surrogate for the quadriceps femoris in human studies of aging skeletal muscle. Ten young (24 ± 2 yr) and ten old (79 ± 7 yr) sedentary individuals underwent magnetic resonance imaging of the quadriceps femoris after 60 min of supine rest. Volume (cm3) and average cross-sectional area (CSA, cm2) of the rectus femoris (RF), vastus lateralis (VL), vastus intermedius (VI), vastus medialis (VM), and the total quadriceps femoris were decreased ( P < 0.05) in older compared with younger women and men. However, percentage of the total quadriceps femoris taken up by each muscle was similar ( P > 0.05) between young and old (RF: 10 ± 0.3 vs. 11 ± 0.4; VL: 33 ± 1 vs. 33 ± 1; VI: 31 ± 1 vs. 31 ± 0.4; VM: 26 ± 1 vs. 25 ± 1%). These results suggest that each of the four muscles of the quadriceps femoris atrophy similarly in aging men and women. Our data support the use of vastus lateralis tissue to represent the quadriceps femoris muscle in aging research.

scholarly journals The Relationship Between Additional Heads of the Quadriceps Femoris, the Vasti Muscles and the Patellar Ligament

2021 ◽  
Author(s):  
Łukasz Olewnik ◽  
Kacper Ruzik ◽  
Bartłomiej Szewczyk ◽  
Michał Podgórski ◽  
Paloma Aragonés ◽  
...  
Keyword(s):  
Vastus Lateralis ◽  
Rectus Femoris ◽  
Quadriceps Femoris ◽  
The Other ◽  
Lower Limbs ◽  
Patellar Ligament ◽  
Vastus Medialis ◽  
Vastus Intermedius ◽  
Deep Layers ◽  
The Relationship

Abstract Introduction: The quadriceps femoris consists of four muscles: the rectus femoris, vastus medialis, vastus intermedius and vastus lateralis. However, the effect of additional quadriceps femoris heads on the vasti muscles and patellar ligaments is unknown.Materials and Methods: One hundred and six lower limbs (34 male and 19 female cadavers) fixed in 10% formalin were examined.Results: On all lower extremities, the vastus lateralis consisted of superficial, intermediate and deep layers. The vastus medialis, on the other hand, consisted of only the longus and obliquus layers. Additional quadriceps femoris heads affected both the vasti muscles and the patellar ligaments.Conclusion: There is a strong correlation between the presence of accessory quadriceps femoris heads and effects on vasti muscles and patellar ligament.

Insulin-induced translocation of Na(+)-K(+)-ATPase subunits to the plasma membrane is muscle fiber type specific

1996 ◽  
Vol 270 (5) ◽  
pp. C1421-C1429 ◽  
Author(s):  
L. Lavoie ◽  
D. Roy ◽  
T. Ramlal ◽  
L. Dombrowski ◽  
P. Martn-Vasallo ◽  
...  
Keyword(s):  
Plasma Membrane ◽  
Plasma Membranes ◽  
Fiber Type ◽  
Vastus Lateralis ◽  
Rectus Femoris ◽  
Insulin Injection ◽  
Morphological Evidence ◽  
Insulin Effect ◽  
Beta 2 ◽  
White Gastrocnemius

We have previously shown that an acute insulin treatment induces redistribution of the alpha 2- and beta 1- isoforms of the Na(+)-K(+)-ATPase from intracellular membranes to plasma membranes detected on subcellular fractionation of mixed muscles and immunoblotting with isoform-specific antibodies (H. S. Hundal et al. J. Biol. Chem. 267: 5040-5043, 1992). In the present study we give both biochemical and morphological evidence that this insulin effect is operative in muscles composed mostly of oxidative (red) fibers but not in muscles composed mostly of glycolytic (white) fibers. The redistribution of the Na(+)-K(+)-ATPase alpha 2- and beta 1-isoforms after insulin injection was detected in membranes isolated from and muscles (soleus, red gastrocnemius, red rectus femoris, and red vastus lateralis) but not in membranes from white muscles (white gastrocnemius, tensor fasciae latae, white rectus femoris, and white vastus lateralis). After insulin injection, the potassium-dependent 3-O-methylfluorescein phosphatase activity of the enzyme was higher by 22% in the plasma membrane-enriched fraction and lower by 15% in the internal membrane fraction isolated from red but not from white muscles. Quantitative immunoelectron microscopy of ultrathin muscle cryosections showed that in vivo insulin stimulation augmented the density of Na(+)-K(+)-ATPase alpha 2- and beta 1- isoforms at the plasma membrane of soleus muscle by 80 and 124%, respectively, with no change in white gastrocnemius muscle. The effect of insulin to increase the content of Na(+)-K(+)-ATPase alpha 2- and beta 1-subunits in isolated plasma membranes was still observed when glycemia was prevented from dropping by using hyperinsulinemic-euglycemic clamps. We conclude that the insulin-induced redistribution of the alpha 2- and beta 1-isoforms of the Na(+)-K(+)-ATPase from an intracellular pool to the plasma membrane in restricted to oxidative fiber-type skeletal muscles. This may be related to the selective expression of beta 1-subunits in these fibers and implies that the beta 2-subunit, typical of glycolytic muscles, does not sustain translocation of alpha 2 beta 2-complexes.

Mechanical behavior of the quadriceps femoris muscle tendon unit during low-load contractions

2008 ◽  
Vol 104 (5) ◽  
pp. 1320-1328 ◽  
Author(s):  
Taija Finni ◽  
Marko Havu ◽  
Shantanu Sinha ◽  
Jussi-Pekka Usenius ◽  
Sulin Cheng
Keyword(s):  
Vastus Lateralis ◽  
Single Point ◽  
Frontal Plane ◽  
Muscle Thickness ◽  
Rectus Femoris ◽  
Quadriceps Femoris ◽  
Thigh Muscle ◽  
Cross Sectional ◽  
Quadriceps Femoris Muscle ◽  
Femoris Muscle

We examined the relationships between morphology and muscle-tendon dynamics of the quadriceps femoris muscle of 11 men using velocity-encoded phase-contrast magnetic resonance imaging (MRI). Thigh muscle electromyography and joint range of motion were first measured outside the MRI scanner during knee extension-flexion tasks that were performed at a rate of 40 times/min with elastic bands providing peak resistance of 5.2 kp (SD 0.4) to the extension. The same movement was repeated inside the MRI scanner bore where tissue velocities and muscle morphology were recorded. The average displacement in the proximal and distal halves of the rectus femoris and vastus intermedius aponeuroses was different ( P = 0.049), reflecting shortening (1.6%), but the tensile strain along the length of the aponeuroses was uniform. The aponeurosis behavior varied among individuals, and these individual patterns were best explained by the differences in relative cross-sectional area of rectus femoris to vastus muscles ( r = 0.71, P = 0.014). During dynamic contraction, considerable deformation of muscles in the axial plane caused an anatomic measure such as muscle thickness to change differently (decrease or increase) in different sites of measurement. For example, when analyzed from the axial images, the vastus lateralis thickness did not change ( P = 0.946) in the frontal plane through femur but increased in a 45° oblique plane between the frontal and sagittal planes ( P = 0.004). The present observations of the heterogeneity and individual behavior emphasize the fact that single-point measurements do not always reflect the overall behavior of muscle-tendon unit.

scholarly journals Reference values for vastus lateralis fiber size and type in healthy subjects over 40 years old: a systematic review and metaanalysis

2013 ◽  
Vol 115 (3) ◽  
pp. 346-354 ◽  
Author(s):  
Fares Gouzi ◽  
Jonathan Maury ◽  
Nicolas Molinari ◽  
Pascal Pomiès ◽  
Jacques Mercier ◽  
...  
Keyword(s):  
Muscle Atrophy ◽  
Muscle Fiber ◽  
Reference Values ◽  
Healthy Subjects ◽  
Fiber Type ◽  
Vastus Lateralis ◽  
Skeletal Muscle Atrophy ◽  
Significant Heterogeneity ◽  
Type I ◽  
And Gender

Skeletal muscle atrophy is a major systemic impairment in chronic diseases. Yet its determinants have been hard to identify because a clear research definition has not been agreed upon. The reduction in muscle fiber cross-sectional area (CSA) is a widely acknowledged marker of muscle atrophy, but no reference values for the muscle fiber CSA at the age of the onset of chronic disease have ever been published. Thus, we aimed to systematically review the studies providing data on fiber CSA and fiber type proportion in the vastus lateralis of the quadriceps of healthy subjects (age >40 yr) and then to pool and analyze the data from the selected studies to determine reference values for fiber CSA. We followed the guidelines of the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) and identified 19 studies, including 423 subjects that matched the inclusion criteria. On the basis of fiber type and gender, the mean fiber CSA and the lower limits of normal (LLNs) were (%type I*60) + 1,743 μm2 and (%type I*60) − 718 μm2, respectively, for men; and (%type I*70) + 139 μm2 and (%type I*70) − 1,485 μm2, respectively, for women. There was no significant heterogeneity among subgroups of fiber type and gender. The pooled type I fiber proportion was 50.3% (LLN = 32.9%). In multivariate analysis, fiber CSA was significantly correlated with V̇o2 peak ( r = 190.92; P = 0.03), and type I fiber proportion was correlated with age ( r = −0.024; P = 0.005), body mass index ( r = 0.096; P = 0.005), and V̇o2 peak ( r = −0.053; P = 0.005). Our metaanalysis of a homogeneous set of studies is the first to provide valuable LLNs for fiber CSA according to fiber type and gender. This analysis will be improved by prospective assessment in well-characterized healthy subjects.

scholarly journals Sub-elite sprinters and rugby players possess different morphological characteristics of the individual hamstrings and quadriceps muscles

PLoS ONE ◽  
2021 ◽  
Vol 16 (10) ◽  
pp. e0259039
Author(s):  
Raki Kawama ◽  
Masamichi Okudaira ◽  
Tatsuya Shimasaki ◽  
Hirohiko Maemura ◽  
Satoru Tanigawa
Keyword(s):  
Vastus Lateralis ◽  
Morphological Characteristics ◽  
Rectus Femoris ◽  
Biceps Femoris ◽  
Quadriceps Femoris ◽  
Cross Sectional ◽  
Vastus Intermedius ◽  
Morphological Differences ◽  
The Individual ◽  
Rugby Players

Numerous studies have clarified that sprinters possess unique morphological characteristics of the thigh muscles compared with non-athletes. However, little evidence is available regarding the morphological differences between sprinters and rugby players. This study aimed to examine the morphological differences in the individual hamstrings and quadriceps femoris muscles between sub-elite sprinters and rugby players. Ultrasound images were acquired from the proximal, middle, and distal regions of the thigh. From the images, the anatomical cross-sectional areas were calculated for 14 sub-elite sprinters, 14 rugby players, and 14 non-athletes. The calculated anatomical cross-sectional areas were normalized to two-thirds power of the body mass, and the normalized values of all regions were averaged as those of the individual muscles. In the hamstrings, the sizes of the biceps femoris short head and semitendinosus were greater in the sprinters than in the rugby players and/or non-athletes (all p < 0.05). In contrast, in the quadriceps femoris, the sizes of the rectus femoris, vastus lateralis, and vastus intermedius were the greatest in the rugby players (all p < 0.05). In the middle region of the biceps femoris short head and the proximal-middle regions of the semitendinosus, the muscle sizes were greater in the sprinters than in the rugby players (all p < 0.05), and vice versa in the middle-distal regions of the rectus femoris (all p < 0.05). These results suggest that 1) sub-elite sprinters possess larger sizes of the biceps femoris short head and semitendinosus, whereas rugby players have larger sizes of the rectus femoris, vastus lateralis, and vastus intermedius, and 2) each of the athletes has different size distributions, especially along the lengths of BFsh, ST, and RF. The findings of the present study would be helpful for rugby players in designing training regimens aimed at enhancing sprint performance.

scholarly journals Safety, Fear and Neuromuscular Responses after a Resisted Knee Extension Performed to Failure in Patients with Severe Haemophilia

2021 ◽  
Vol 10 (12) ◽  
pp. 2587
Author(s):  
Joaquín Calatayud ◽  
Jonathan Martín-Cuesta ◽  
Juan J. Carrasco ◽  
Sofía Pérez-Alenda ◽  
Carlos Cruz-Montecinos ◽  
...  
Keyword(s):  
Adverse Effects ◽  
Prophylactic Treatment ◽  
Vastus Lateralis ◽  
Rectus Femoris ◽  
Knee Extension ◽  
Moderate Intensity ◽  
Median Frequency ◽  
Severe Haemophilia ◽  
Fear Of Movement ◽  
Neuromuscular Responses

Background: low–moderate intensity strength training to failure increases strength and muscle hypertrophy in healthy people. However, no study assessed the safety and neuromuscular response of training to failure in people with severe haemophilia (PWH). The purpose of the study was to analyse neuromuscular responses, fear of movement, and possible adverse effects in PWH, after knee extensions to failure. Methods: twelve severe PWH in prophylactic treatment performed knee extensions until failure at an intensity of five on the Borg CR10 scale. Normalised values of amplitude (nRMS) and neuromuscular fatigue were determined using surface electromyography for the rectus femoris, vastus medialis, and vastus lateralis. After the exercise, participants were asked about their perceived change in fear of movement, and to report any possible adverse effects. Results: Patients reported no adverse effects or increased fear. The nRMS was maximal for all the muscles before failure, the median frequency decreased, and wavelet index increased during the repetitions. The vastus lateralis demonstrated a higher maximum nRMS threshold and earlier fatigue, albeit with a lower and more progressive overall fatigue. Conclusions: severe PWH with adequate prophylactic treatment can perform knee extensions to task failure using a moderate intensity, without increasing fear of movement, or adverse effects.

scholarly journals MR imaging of the quadriceps femoris tendon: distal tear characterization and clinical significance of rupture types

2021 ◽  
Author(s):  
Anna L. Falkowski ◽  
Jon A. Jacobson ◽  
Michael T. Hirschmann ◽  
Vivek Kalia
Keyword(s):  
Mr Imaging ◽  
Vastus Lateralis ◽  
Case Series ◽  
Rectus Femoris ◽  
Quadriceps Tendon ◽  
Quadriceps Femoris ◽  
Vastus Medialis ◽  
Bony Avulsion ◽  
Tendon Tears ◽  
Reader Reliability

Abstract Objective To characterize quadriceps femoris tendon tears on magnetic resonance (MR) imaging regarding tear extent, location, and presence of bony avulsion. Materials and methods IRB approval was obtained and informed consent was waived for this retrospective case series. Electronic medical records from all patients in our hospital system were searched for keywords: knee MR imaging, and quadriceps tendon rupture or tear. MRI studies were randomized and independently evaluated by two fellowship-trained musculoskeletal radiologists. MR imaging was used to characterize each individual quadriceps tendon as having tendinosis, tear (location, partial versus complete, size, and retraction distance), and bony avulsion. Knee radiographs were reviewed for presence or absence of bony avulsion. Descriptive statistics and inter-reader reliability (Cohen’s Kappa and Wilcoxon-signed-rank test) were calculated. Results Fifty-two patients with 53 quadriceps tears were evaluated (45 males, 7 females; mean age: 51 ± 13 years). The vastus intermedius (VI) tendon more often incurred a partial rather than a complete tear (39.6% vs. 37.7%), while the rectus femoris (RF), vastus medialis (VM), and vastus lateralis (VL) incurred complete tears more commonly (64.2–66%). Subjects with bony avulsion on radiographs had higher-grade tears of the RF, VM, and VL tears (p = 0.020–0.043) but not the VI. Most tendons tore at or immediately proximal to the patella (84.8–93.6%). Gaps in retracted torn tendons measured between 2.3 and 2.7 cm. Inter-reader reliability was substantial to almost perfect (κ = 0.624–0.953). Conclusion Quadriceps femoris tendon tears most commonly involve the RF or VL/VM layers usually in proximity to the patella. A bony avulsion correlates with a more extensive tear. Key Points • Quadriceps femoris tendon tears most commonly involve the rectus femoris or vastus lateralis/vastus medialis layers. • A rupture of the quadriceps femoris tendon usually occurs in proximity to the patella. • A bony avulsion of the patella correlates with a more extensive tear of the superficial and middle layers of the quadriceps tendon.

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