scholarly journals The primacy of ultrasound in the assessment of muscle architecture: precision, accuracy, reliability of ultrasonography. Physiatrist, radiologist, general internist, and family practitioner's experiences

2019 ◽  
Vol 65 (2) ◽  
pp. 165-170 ◽  
Author(s):  
Rita Chiaramonte ◽  
Marco Bonfiglio ◽  
Emilio G. Castorina ◽  
Salvatore A. M. Antoci

SUMMARY OBJECTIVE: With high-resolution real-time ultrasonography we investigated the muscle architectural parameters of vastus lateralis in healthy volunteers. PURPOSES: We determined the reproducibility and validity of ultrasonography and the role of the ultrasonographer in assessing muscle architecture. We proposed the most appropriate clinical parameters for objective measurements and an ultrasound protocol of muscle architecture. METHODS: We conducted an intraobserver and interobserver study. We investigated 21 healthy male volunteers. The subjects were independently evaluated by four different operators using high-resolution real-time ultrasonography. To assess the reproducibility of ultrasound examinations, four operators repeated measurements using the same ultrasound device. Muscle thickness, muscle volume, muscle fiber pennation angle, and subcutaneous adiposity of the vastus lateralis muscle were measured. RESULTS: Intra-observer (ICC 0.92-0.97), interobserver (ICC 0.78-0.92) reproducibility was good to excellent for all measurements. CONCLUSION: Simple, reproducible, non-invasive ultrasound measurements of muscle structure easily demonstrated differences in muscle morphology. With a protocol and with objective and repeatable measurements, sonographers from different backgrounds could obtain an objective measurement of ultrasound images with little differences and low variability in results, thanks to the upgrading of diagnostic ultrasound imaging and their clinical skills.

Author(s):  
Eurico Peixoto César ◽  
Letícia De Oliveira Teixeira ◽  
Daniel Vieira Braña Côrtes de Souza ◽  
Paulo Sergio Chagas Gomes

The aim of the study was to investigate the acute effects of passive static stretching (PSS) on the fascicle length (FL) and fascicle angle (FA) of the vastus lateralis muscle (VL) in two different joint positions. Twelve physically active men (26.9 ± 7.5 years, 178.6 ± 7.0 cm, and 82.5 ± 16.8 kg) were placed in the prone position for the acquisition of ultrasound images (US) of VL, registered with extended and totally flexed knee up to the heel contact with the gluteus, before and after a PSS routine comprised of three 30-s repetitions maintained in the maximal discomfort position as reported by the participant. Results of the paired t-test indicated an increase in FL (16.2%; p = 0.012) and reduction in FA (15.5%; p = 0.003) in pre vs. post stretching comparisons for the extended knee position. There was also a significant increase in FL (34%; p = 0.0001) and reduction in FA (25%; p = 0.0007) when compared the extended knee vs. flexed knee positions. There were no significant differences in muscle architecture variables for the flexed knee position. The results showed high and moderate correlation of FL and FA for the extended (r = -0.89 and r = -0.74) and flexed knee (r = -0.76 and r = -0.78) position, pre and post stretching, respectively. It was concluded that the static stretching acutely affects the vastus lateralis muscle architecture only in the extended knee position, but not in the flexed knee position.


2017 ◽  
Vol 118 (2) ◽  
pp. 291-301 ◽  
Author(s):  
Robert Marzilger ◽  
Kirsten Legerlotz ◽  
Chrystalla Panteli ◽  
Sebastian Bohm ◽  
Adamantios Arampatzis

1993 ◽  
Vol 80 (10) ◽  
pp. 1274-1277 ◽  
Author(s):  
G. Geroulakos ◽  
G. Ramaswami ◽  
A. Nicolaides ◽  
K. James ◽  
N. Labropoulos ◽  
...  

Radiology ◽  
1979 ◽  
Vol 133 (2) ◽  
pp. 413-417 ◽  
Author(s):  
William Scheible ◽  
George R. Leopold ◽  
Victor L. Woo ◽  
Barbara B. Gosink

2018 ◽  
Vol 24 (4) ◽  
pp. 342-346 ◽  
Author(s):  
Marcello Zappia ◽  
Daniela Berritto ◽  
Francesco Oliva ◽  
Nicola Maffulli

1988 ◽  
Vol 155 (1) ◽  
pp. 93-97 ◽  
Author(s):  
David H. Adams ◽  
Calliope Fine ◽  
David C. Brooks

2015 ◽  
Vol 21 (4) ◽  
pp. 428-435
Author(s):  
Guilherme Auler Brodt ◽  
Jeam Marcel Geremia ◽  
Mônica de Oliveira Melo ◽  
Marco Aurélio Vaz ◽  
Jefferson Fagundes Loss

Abstract The aim of this study was to compare the knee extension moment of older individuals with the muscle moment estimated through a biomechanical model. This was accomplished by using (1) the specific muscle architecture data of individuals, and (2) the generic muscle architecture available in the literature. The muscle force estimate was determined using a model with the muscle architecture from cadavers and the individual vastus lateralis muscle architecture of sixteen older volunteers. For the muscle moment comparison, all of the volunteers performed maximal voluntary isometric contractions (MVIC) in five different knee extension position angles. The architectural data was acquired using both resonance and ultrasound imaging. Both estimated muscle moments (generic and individual) were higher than the experimental. The architecture of the other vastii may be necessary to make the model more accurate for the older population. Although other factors inherent to ageing, such as co-contractions, fiber type percentage, and passive forces are not considered in the model, they could be responsible for the differences between moments in older people.


Sign in / Sign up

Export Citation Format

Share Document