Effects of static stretching on mechanical properties and collagen fiber orientation of the Achilles tendon in vivo

2018 ◽  
Vol 60 ◽  
pp. 115-120 ◽  
Author(s):  
Keitaro Kubo
Keyword(s):  
Mechanical Properties ◽  
Achilles Tendon ◽  
Fiber Orientation ◽  
Collagen Fiber ◽  
Static Stretching ◽  
Collagen Fiber Orientation

In vivo imaging of collagen fiber orientation with rapid polarization-resolved SHG microscopy

2013 ◽  
Author(s):  
Yuji Tanaka ◽  
Eiji Hase ◽  
Shuichiro Fukushima ◽  
Takeshi Yasui ◽  
Tsutomu Araki
Keyword(s):  
In Vivo Imaging ◽  
Fiber Orientation ◽  
Collagen Fiber ◽  
Collagen Fiber Orientation

scholarly journals Biomechanics of Porcine Renal Arteries and Role of Axial Stretch

2013 ◽  
Vol 135 (8) ◽  
Author(s):  
Stéphane Avril ◽  
Pierre Badel ◽  
Mohamed Gabr ◽  
Michael A. Sutton ◽  
Susan M. Lessner
Keyword(s):  
Axial Force ◽  
Fiber Orientation ◽  
Collagen Fiber ◽  
Biomechanical Model ◽  
Renal Arteries ◽  
Axial Stretch ◽  
Collagen Fiber Orientation ◽  
Normal Ranges ◽  
Biaxial Behavior

It is known that arteries experience significant axial stretches in vivo. Several authors have shown that the axial force needed to maintain an artery at its in vivo axial stretch does not change with transient cyclical pressurization over normal ranges. However, the axial force phenomenon of arteries has never been explained with microstructural considerations. In this paper we propose a simple biomechanical model to relate the specific axial force phenomenon of arteries to the predicted load-dependent average collagen fiber orientation. It is shown that (a) the model correctly predicts the authors' experimentally measured biaxial behavior of pig renal arteries and (b) the model predictions are in agreement with additional experimental results reported in the literature. Finally, we discuss the implications of the model for collagen fiber orientation and deposition in arteries.

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