Frequency analysis of ultrasonic echo intensities of the skeletal muscle in elderly and young individuals

Ken Nishihara,1 Hisashi Kawai,2 Hiroyuki Hayashi,3 Hideo Naruse,4 Akihito Kimura,4 Toshiaki Gomi,5 Fumihiko Hoshi1 1Department of Physical Therapy, Saitama Prefectural University, Saitama, Japan; 2Health Promotion Management Office, Tokyo Metropolitan Geriatric Hospital and Institute of Gerontology...

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Autores principales:	Nishihara K, Kawai H, Hayashi H, Naruse H, Kimura A, Gomi T, Hoshi F
Formato:	article
Lenguaje:	EN
Publicado:	Dove Medical Press 2014
Materias:	elderly individual motor function muscle strength ultrasound echo intensity frequency analysis Geriatrics RC952-954.6
Acceso en línea:	https://doaj.org/article/5a9ac0dd37e54331b35bfc327602dc28
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spelling	oai:doaj.org-article:5a9ac0dd37e54331b35bfc327602dc282021-12-02T03:37:55ZFrequency analysis of ultrasonic echo intensities of the skeletal muscle in elderly and young individuals1178-1998https://doaj.org/article/5a9ac0dd37e54331b35bfc327602dc282014-09-01T00:00:00Zhttps://www.dovepress.com/frequency-analysis-of-ultrasonic-echo-intensities-of-the-skeletal-musc-peer-reviewed-article-CIAhttps://doaj.org/toc/1178-1998Ken Nishihara,1 Hisashi Kawai,2 Hiroyuki Hayashi,3 Hideo Naruse,4 Akihito Kimura,4 Toshiaki Gomi,5 Fumihiko Hoshi1 1Department of Physical Therapy, Saitama Prefectural University, Saitama, Japan; 2Health Promotion Management Office, Tokyo Metropolitan Geriatric Hospital and Institute of Gerontology, Tokyo, Japan; 3Center for University-wide Education, Saitama Prefectural University, Saitama, Japan; 4Faculty of Health Sciences, Tokyo Ariake University of Medical and Health Sciences, Tokyo, Japan, 5Faculty of Nursing, Tokyo Ariake University of Medical and Health Sciences, Tokyo, Japan Background: The skeletal muscle echo intensity (EI) during ultrasound imaging has been investigated to evaluate the muscle quality. However, EI fluctuates according to the scanning conditions.Methods: The motor functions and ultrasound images of 19 elderly (73±3.2 years) and 19 young (22±1.5 years) individuals were investigated and an EI frequency component was assessed for more reliable evaluations. Healthy elderly and young subjects participated in this study. The motor functions were assessed during walking and according to the knee extension muscle strength. The muscle thicknesses of rectus femoris (RF), vastus intermedius (VI), and quadriceps femoris (QF) were investigated. EIs were calculated and the mean frequencies of the regions of interest (MFROIs) for RF and VI were analyzed. Results: EIs and MFROIs were greater in elderly subjects than in young subjects (P<0.01 for RF, and P<0.001 for VI, in EIs; and P<0.01 for RF, and P<0.05 for VI, in MFROIs). In young subjects, EI of RF was greater than that of VI; however, there was no difference between the RF and VI MFROIs in both elderly and young subjects. EIs of VI exhibited a significantly negative correlation with the QF thickness in both elderly and young subjects. RF MFROIs negatively correlated with the QF thickness and positively correlated with EI of VI in elderly subjects alone. Conclusion: These findings suggest that MFROIs of elderly individuals would have a larger value than those of young individuals; moreover, MFROIs did not fluctuate greatly with the tissue depth and scanning conditions. MFROIs might be thus useful for further investigations of muscle quality and applications for the early prevention of age-related motor functional decline. Keywords: elderly individual, motor function, muscle strength, ultrasound, echo intensity, frequency analysisNishihara KKawai HHayashi HNaruse HKimura AGomi THoshi FDove Medical Pressarticleelderly individualmotor functionmuscle strengthultrasoundecho intensityfrequency analysisGeriatricsRC952-954.6ENClinical Interventions in Aging, Vol Volume 9, Pp 1471-1478 (2014)
institution	DOAJ
collection	DOAJ
language	EN
topic	elderly individual motor function muscle strength ultrasound echo intensity frequency analysis Geriatrics RC952-954.6
spellingShingle	elderly individual motor function muscle strength ultrasound echo intensity frequency analysis Geriatrics RC952-954.6 Nishihara K Kawai H Hayashi H Naruse H Kimura A Gomi T Hoshi F Frequency analysis of ultrasonic echo intensities of the skeletal muscle in elderly and young individuals
description	Ken Nishihara,1 Hisashi Kawai,2 Hiroyuki Hayashi,3 Hideo Naruse,4 Akihito Kimura,4 Toshiaki Gomi,5 Fumihiko Hoshi1 1Department of Physical Therapy, Saitama Prefectural University, Saitama, Japan; 2Health Promotion Management Office, Tokyo Metropolitan Geriatric Hospital and Institute of Gerontology, Tokyo, Japan; 3Center for University-wide Education, Saitama Prefectural University, Saitama, Japan; 4Faculty of Health Sciences, Tokyo Ariake University of Medical and Health Sciences, Tokyo, Japan, 5Faculty of Nursing, Tokyo Ariake University of Medical and Health Sciences, Tokyo, Japan Background: The skeletal muscle echo intensity (EI) during ultrasound imaging has been investigated to evaluate the muscle quality. However, EI fluctuates according to the scanning conditions.Methods: The motor functions and ultrasound images of 19 elderly (73±3.2 years) and 19 young (22±1.5 years) individuals were investigated and an EI frequency component was assessed for more reliable evaluations. Healthy elderly and young subjects participated in this study. The motor functions were assessed during walking and according to the knee extension muscle strength. The muscle thicknesses of rectus femoris (RF), vastus intermedius (VI), and quadriceps femoris (QF) were investigated. EIs were calculated and the mean frequencies of the regions of interest (MFROIs) for RF and VI were analyzed. Results: EIs and MFROIs were greater in elderly subjects than in young subjects (P<0.01 for RF, and P<0.001 for VI, in EIs; and P<0.01 for RF, and P<0.05 for VI, in MFROIs). In young subjects, EI of RF was greater than that of VI; however, there was no difference between the RF and VI MFROIs in both elderly and young subjects. EIs of VI exhibited a significantly negative correlation with the QF thickness in both elderly and young subjects. RF MFROIs negatively correlated with the QF thickness and positively correlated with EI of VI in elderly subjects alone. Conclusion: These findings suggest that MFROIs of elderly individuals would have a larger value than those of young individuals; moreover, MFROIs did not fluctuate greatly with the tissue depth and scanning conditions. MFROIs might be thus useful for further investigations of muscle quality and applications for the early prevention of age-related motor functional decline. Keywords: elderly individual, motor function, muscle strength, ultrasound, echo intensity, frequency analysis
format	article
author	Nishihara K Kawai H Hayashi H Naruse H Kimura A Gomi T Hoshi F
author_facet	Nishihara K Kawai H Hayashi H Naruse H Kimura A Gomi T Hoshi F
author_sort	Nishihara K
title	Frequency analysis of ultrasonic echo intensities of the skeletal muscle in elderly and young individuals
title_short	Frequency analysis of ultrasonic echo intensities of the skeletal muscle in elderly and young individuals
title_full	Frequency analysis of ultrasonic echo intensities of the skeletal muscle in elderly and young individuals
title_fullStr	Frequency analysis of ultrasonic echo intensities of the skeletal muscle in elderly and young individuals
title_full_unstemmed	Frequency analysis of ultrasonic echo intensities of the skeletal muscle in elderly and young individuals
title_sort	frequency analysis of ultrasonic echo intensities of the skeletal muscle in elderly and young individuals
publisher	Dove Medical Press
publishDate	2014
url	https://doaj.org/article/5a9ac0dd37e54331b35bfc327602dc28
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Frequency analysis of ultrasonic echo intensities of the skeletal muscle in elderly and young individuals

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