TY - JOUR
T1 - Age-related differences in muscle shear moduli in the lower extremity
AU - Akagi, Ryota
AU - Yamashita, Yota
AU - Ueyasu, Yuta
N1 - Funding Information:
This study was partly supported by MEXT/JSPS KAKENHI Grant 24700689 (Grant-in-Aid for Young Scientists [B]) and the Nakatomi Foundation in 2014.
Publisher Copyright:
© 2015 World Federation for Ultrasound in Medicine and Biology.
PY - 2015/11
Y1 - 2015/11
N2 - This study investigated the age-related differences in shear moduli of the rectus femoris muscle (RF), the lateral head of the gastrocnemius muscle (LG) and the soleus muscle (SOL) using shear wave ultrasound elastography. Thirty-one young individuals and 49 elderly individuals volunteered for this study. The shear modulus of RF was determined at 50% of the thigh length, and those of LG and SOL were determined at 30% of the lower leg length. RF and LG shear moduli were significantly higher in young individuals than in elderly individuals, but there was no age-related difference in SOL shear modulus. From the standpoint of an index reflecting muscle mechanical properties, it is suggested that the lower muscle shear moduli of RF and LG are the reason for the decreased explosive muscle strength in the lower extremity and the increased risk of falls for elderly individuals.
AB - This study investigated the age-related differences in shear moduli of the rectus femoris muscle (RF), the lateral head of the gastrocnemius muscle (LG) and the soleus muscle (SOL) using shear wave ultrasound elastography. Thirty-one young individuals and 49 elderly individuals volunteered for this study. The shear modulus of RF was determined at 50% of the thigh length, and those of LG and SOL were determined at 30% of the lower leg length. RF and LG shear moduli were significantly higher in young individuals than in elderly individuals, but there was no age-related difference in SOL shear modulus. From the standpoint of an index reflecting muscle mechanical properties, it is suggested that the lower muscle shear moduli of RF and LG are the reason for the decreased explosive muscle strength in the lower extremity and the increased risk of falls for elderly individuals.
KW - Lateral head of gastrocnemius muscle
KW - Rectus femoris muscle
KW - Shear modulus
KW - Shear wave ultrasound elastography
KW - Soleus muscle
UR - http://www.scopus.com/inward/record.url?scp=84943579940&partnerID=8YFLogxK
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U2 - 10.1016/j.ultrasmedbio.2015.07.011
DO - 10.1016/j.ultrasmedbio.2015.07.011
M3 - Article
C2 - 26314496
AN - SCOPUS:84943579940
SN - 0301-5629
VL - 41
SP - 2906
EP - 2912
JO - Ultrasound in Medicine and Biology
JF - Ultrasound in Medicine and Biology
IS - 11
ER -