Abstract:Verification of the accuracy of measuring the muscle cross-sectional area and muscle intensity of the rectus femoris using ultrasonography. Jpn J Compr Rehabil Sci 2018; 9: 66-72.Objective: This study aimed to establish ultrasonography as a method of measuring the muscle cross-sectional area and muscle intensity of the rectus femoris and to assess its measurement accuracy. Methods: Three testers measured the muscle crosssectional area and muscle intensity of the rectus femoris using ultrasonography in 16 healt… Show more
We investigated the relationship between impedance parameters and skeletal muscle function in the lower extremities, as well as the effectiveness of impedance parameters in evaluating muscle quality. Lower extremity impedance of 19 healthy men (aged 23–31 years) measured using the direct segmental multi-frequency bioelectrical impedance analysis were arc-optimized using the Cole–Cole model, following which phase angle (PA), $${R}_{i}/{R}_{e}$$
R
i
/
R
e
, and β were estimated. Skeletal muscle function was assessed by muscle thickness, muscle intensity, and isometric knee extension force (IKEF). IKEF was positively correlated with PA (r = 0.58, p < 0.01) and β (r = 0.34, p < 0.05) was negatively correlated with $${R}_{i}/{R}_{e}$$
R
i
/
R
e
(r = − 0.43, p < 0.01). Stepwise multiple regression analysis results revealed that PA, β, and $${R}_{i}/{R}_{e}$$
R
i
/
R
e
were correlated with IKEF independently of muscle thickness. This study suggests that arc-optimized impedance parameters are effective for evaluating muscle quality and prediction of muscle strength.
We investigated the relationship between impedance parameters and skeletal muscle function in the lower extremities, as well as the effectiveness of impedance parameters in evaluating muscle quality. Lower extremity impedance of 19 healthy men (aged 23–31 years) measured using the direct segmental multi-frequency bioelectrical impedance analysis were arc-optimized using the Cole–Cole model, following which phase angle (PA), $${R}_{i}/{R}_{e}$$
R
i
/
R
e
, and β were estimated. Skeletal muscle function was assessed by muscle thickness, muscle intensity, and isometric knee extension force (IKEF). IKEF was positively correlated with PA (r = 0.58, p < 0.01) and β (r = 0.34, p < 0.05) was negatively correlated with $${R}_{i}/{R}_{e}$$
R
i
/
R
e
(r = − 0.43, p < 0.01). Stepwise multiple regression analysis results revealed that PA, β, and $${R}_{i}/{R}_{e}$$
R
i
/
R
e
were correlated with IKEF independently of muscle thickness. This study suggests that arc-optimized impedance parameters are effective for evaluating muscle quality and prediction of muscle strength.
“…In the field of physical therapy, skeletal muscle has been evaluated by various methods for a long time. Among these methods, ultrasonography is widely used for skeletal muscle analysis because it is non-invasive and convenient 9 , 10 , 11 , 12 ) . In the maxillofacial region, many studies have reported the use of ultrasonographic devices to evaluate the masticatory muscles 13 , 14 , 15 , 16 , 17 ) , but the methods and results have not yet been standardized 15 , 16 , 17 ) .…”
[Purpose] Ultrasonography can be used to non-invasively analyze any cross-section of the
human body and to measure tissue elasticity, thickness, and brightness. This study was
performed to examine the quantitative and qualitative changes in the masseter muscle at
rest and at maximal occlusion, and to evaluate the relationship between these changes and
the general health of the individual. [Participants and Methods] The study cohort
comprised 30 healthy adults. Correlations between basic participant information (sex, age,
height, body weight, body mass index, body fat, maximum bite force, handgrip strength, and
tongue pressure) and masseter muscle ultrasonographic data were examined. [Results]
Masseter muscle thickness was significantly greater in males than in females. Body weight
and body mass index correlated positively with masseter muscle thickness. Body mass index
and body fat percentage correlated positively with masseter muscle brightness. Tongue
pressure correlated positively with handgrip strength. [Conclusion] Our analyses of muscle
thickness and brightness suggest that ultrasonography may be useful in evaluating masseter
muscle quantity and quality, and that the condition of the masseter muscle may correlate
with the overall health status of the individual.
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