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Quantitative mechanical properties of the relaxed biceps and triceps brachii muscles in patients with subacute stroke: a reliability study of the myoton-3 myometer.

Chuang LL, Wu CY, Lin KC, Lur SY - Stroke Res Treat (2012)

Bottom Line: Results.The SEM and MDC of bilateral biceps and triceps brachii muscles indicated small measurement error (SEM% <10%, MDC% <25%).Conclusion.

View Article: PubMed Central - PubMed

Affiliation: School of Occupational Therapy, College of Medicine, National Taiwan University, Taipei, Taiwan.

ABSTRACT
Objective. Test-retest reliability of the myotonometer was investigated in patients with subacute stroke. Methods. Twelve patients with substroke (3 to 9 months poststroke) were examined in standardized testing position twice, 60 minutes apart, with the Myoton-3 myometer to measure tone, elasticity, and stiffness of relaxed bilateral biceps and triceps brachii muscles. Intrarater reliability of muscle properties was determined using intraclass correlation coefficient (ICC), the standard error of measurement (SEM), and the minimal detectable change (MDC). Results. Intrarater reliability of muscle properties of bilateral biceps and triceps brachii muscles were good (ICCs = 0.79-0.96) except for unaffected biceps tone (ICC = 0.72). The SEM and MDC of bilateral biceps and triceps brachii muscles indicated small measurement error (SEM% <10%, MDC% <25%). Conclusion. The Myoton-3 myometer is a reliable tool for quantifying muscle tone, elasticity, and stiffness of the biceps and triceps brachii in patients with subacute stroke.

No MeSH data available.


Related in: MedlinePlus

Damped oscillations of the muscle show displacement (s), velocity (v), and acceleration (a) in myotonometric measurements. T is the oscillation period, amax⁡ is the maximal amplitude of oscillation, and Δl is the maximal deformation depth of the muscle.
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fig2: Damped oscillations of the muscle show displacement (s), velocity (v), and acceleration (a) in myotonometric measurements. T is the oscillation period, amax⁡ is the maximal amplitude of oscillation, and Δl is the maximal deformation depth of the muscle.

Mentions: The Myoton-3 myometer exerts a short mechanical pulse on the tested muscle, which causes muscle to be deformed for a short interval. The muscle responds to the mechanical stimulus in the form of damped oscillations recorded by an acceleration transducer on the testing end, and 3 parameters are calculated from the curve (Figure 2). Three mechanical properties of the muscle tissue are (1) the natural oscillation frequency (Hz), (2) the logarithmic decrement of damping oscillations, and (3) the stiffness (N/m) [15, 27, 34].


Quantitative mechanical properties of the relaxed biceps and triceps brachii muscles in patients with subacute stroke: a reliability study of the myoton-3 myometer.

Chuang LL, Wu CY, Lin KC, Lur SY - Stroke Res Treat (2012)

Damped oscillations of the muscle show displacement (s), velocity (v), and acceleration (a) in myotonometric measurements. T is the oscillation period, amax⁡ is the maximal amplitude of oscillation, and Δl is the maximal deformation depth of the muscle.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3350849&req=5

fig2: Damped oscillations of the muscle show displacement (s), velocity (v), and acceleration (a) in myotonometric measurements. T is the oscillation period, amax⁡ is the maximal amplitude of oscillation, and Δl is the maximal deformation depth of the muscle.
Mentions: The Myoton-3 myometer exerts a short mechanical pulse on the tested muscle, which causes muscle to be deformed for a short interval. The muscle responds to the mechanical stimulus in the form of damped oscillations recorded by an acceleration transducer on the testing end, and 3 parameters are calculated from the curve (Figure 2). Three mechanical properties of the muscle tissue are (1) the natural oscillation frequency (Hz), (2) the logarithmic decrement of damping oscillations, and (3) the stiffness (N/m) [15, 27, 34].

Bottom Line: Results.The SEM and MDC of bilateral biceps and triceps brachii muscles indicated small measurement error (SEM% <10%, MDC% <25%).Conclusion.

View Article: PubMed Central - PubMed

Affiliation: School of Occupational Therapy, College of Medicine, National Taiwan University, Taipei, Taiwan.

ABSTRACT
Objective. Test-retest reliability of the myotonometer was investigated in patients with subacute stroke. Methods. Twelve patients with substroke (3 to 9 months poststroke) were examined in standardized testing position twice, 60 minutes apart, with the Myoton-3 myometer to measure tone, elasticity, and stiffness of relaxed bilateral biceps and triceps brachii muscles. Intrarater reliability of muscle properties was determined using intraclass correlation coefficient (ICC), the standard error of measurement (SEM), and the minimal detectable change (MDC). Results. Intrarater reliability of muscle properties of bilateral biceps and triceps brachii muscles were good (ICCs = 0.79-0.96) except for unaffected biceps tone (ICC = 0.72). The SEM and MDC of bilateral biceps and triceps brachii muscles indicated small measurement error (SEM% <10%, MDC% <25%). Conclusion. The Myoton-3 myometer is a reliable tool for quantifying muscle tone, elasticity, and stiffness of the biceps and triceps brachii in patients with subacute stroke.

No MeSH data available.


Related in: MedlinePlus