کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4064597 1266218 2015 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Muscle shear elastic modulus is linearly related to muscle torque over the entire range of isometric contraction intensity
موضوعات مرتبط
علوم پزشکی و سلامت پزشکی و دندانپزشکی ارتوپدی، پزشکی ورزشی و توانبخشی
پیش نمایش صفحه اول مقاله
Muscle shear elastic modulus is linearly related to muscle torque over the entire range of isometric contraction intensity
چکیده انگلیسی

Muscle shear elastic modulus is linearly related to muscle torque during low-level contractions (<60% of Maximal Voluntary Contraction, MVC). This measurement can therefore be used to estimate changes in individual muscle force. However, it is not known if this relationship remains valid for higher intensities. The aim of this study was to determine: (i) the relationship between muscle shear elastic modulus and muscle torque over the entire range of isometric contraction and (ii) the influence of the size of the region of interest (ROI) used to average the shear modulus value. Ten healthy males performed two incremental isometric little finger abductions. The joint torque produced by Abductor Digiti Minimi was considered as an index of muscle torque and elastic modulus. A high coefficient of determination (R2) (range: 0.86–0.98) indicated that the relationship between elastic modulus and torque can be accurately modeled by a linear regression over the entire range (0% to 100% of MVC). The changes in shear elastic modulus as a function of torque were highly repeatable. Lower R2 values (0.89 ± 0.13 for 1/16 of ROI) and significantly increased absolute errors were observed when the shear elastic modulus was averaged over smaller ROI, half, 1/4 and 1/16 of the full ROI) than the full ROI (mean size: 1.18 ± 0.24 cm2). It suggests that the ROI should be as large as possible for accurate measurement of muscle shear modulus.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Electromyography and Kinesiology - Volume 25, Issue 4, August 2015, Pages 703–708
نویسندگان
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