Morphological and mechanical properties of the human triceps surae aponeuroses taken from elderly cadavers

Implications for muscle-tendon interactions

Xiyao Shan, Shun Otsuka, Tomiko Yakura, Munekazu Naito, Takashi Nakano, Yasuo Kawakami

研究成果: Article

抄録

The human triceps surae (two gastrocnemii and soleus) has aponeuroses in the proximal and distal aspects, the latter of which insert into the calcaneus by sharing the common Achilles tendon. These tendinous tissues are known to have elasticity and upon muscle contraction the aponeurosis is stretched both longitudinally (along the muscle's line of action) and transversely. Higher aponeurosis transverse deformability has been documented, but there is a paucity of information on the morphology and mechanical properties of human aponeurosis. This study aimed to identify morphological and mechanical characteristics of the human triceps surae aponeuroses. Twenty-five triceps surae muscle-tendon units were procured from 13 human donors (formalin fixed, 6 males, 7 females) aged 67-91 years. Specimens of aponeuroses were excised from the eight regions (posterior and anterior regions of the gastrocnemius medialis and lateralis, medial and lateral parts of soleus; proximal, middle, and distal sites each, 2-4 cm × 2-4 cm). Aponeurosis thickness was measured using a digital caliper. Uniaxial tensile tests were implemented to determine the mechanical properties of specimens loaded longitudinally (along the muscle's line of action) and transversely. The aponeurosis thickness showed significant differences between muscles and sites, while Young's modulus showed direction-dependent (longitudinal vs. transverse) differences within sites. Results show different morphology and mechanical properties of aponeuroses between synergist muscles. The reason for site-dependent differences in stiffness is due to a reduced aponeurosis thickness rather than a reduction in the material property. The anisotropic elastic feature (differences between longitudinal and transverse directions) of the aponeuroses was more pronounced than previous in vivo findings, suggesting inherent material design of the aponeurosis that matches three-dimensional contractile behavior of muscle fibers.

元の言語English
記事番号e0211485
ジャーナルPloS one
14
発行部数2
DOI
出版物ステータスPublished - 2019 2 1

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Tendons
tendons
Cadaver
mechanical properties
Muscle
Muscles
Mechanical properties
muscles
calipers
synergists
muscle contraction
elasticity (mechanics)
formalin
modulus of elasticity
muscle fibers
Formability
Aponeurosis
Formaldehyde
Elasticity
Materials properties

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Agricultural and Biological Sciences(all)

これを引用

Morphological and mechanical properties of the human triceps surae aponeuroses taken from elderly cadavers : Implications for muscle-tendon interactions. / Shan, Xiyao; Otsuka, Shun; Yakura, Tomiko; Naito, Munekazu; Nakano, Takashi; Kawakami, Yasuo.

:: PloS one, 巻 14, 番号 2, e0211485, 01.02.2019.

研究成果: Article

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