Abstract：
:We use supersonic shear wave imaging (SSI) technique to measure not only the linear but also the nonlinear elastic properties of brain matter. Here, we tested six porcine brains ex vivo and measured the velocities of the plane shear waves induced by acoustic radiation force at different states of pre-deformation when the ultrasonic probe is pushed into the soft tissue. We relied on an inverse method based on the theory governing the propagation of small-amplitude acoustic waves in deformed solids to interpret the experimental data. We found that, depending on the subjects, the resulting initial shear modulus [Formula: see text] varies from 1.8 to 3.2 kPa, the stiffening parameter [Formula: see text] of the hyperelastic Demiray-Fung model from 0.13 to 0.73, and the third- [Formula: see text] and fourth-order [Formula: see text] constants of weakly nonlinear elasticity from [Formula: see text]1.3 to [Formula: see text]20.6 kPa and from 3.1 to 8.7 kPa, respectively. Paired [Formula: see text] test performed on the experimental results of the left and right lobes of the brain shows no significant difference. These values are in line with those reported in the literature on brain tissue, indicating that the SSI method, combined to the inverse analysis, is an efficient and powerful tool for the mechanical characterization of brain tissue, which is of great importance for computer simulation of traumatic brain injury and virtual neurosurgery.
journal_name
Biomech Model Mechanobioljournal_title
Biomechanics and modeling in mechanobiologyauthors
Jiang Y,Li G,Qian LX,Liang S,Destrade M,Cao Ydoi
10.1007/s10237-015-0658-0subject
Has Abstractpub_date
2015-10-01 00:00:00pages
1119-28issue
5eissn
1617-7959issn
1617-7940journal_volume
14pub_type
杂志文章abstract：:Experimental evidence suggests that interstitial fluid flow is a stimulus for mechanoadaptation in bone. Bone adaptation is sensitive to the frequency of loading and rest insertion between load cycles. We investigated the effects of permeability, frequency and rest insertion on fluid flow in bone using finite-element ...
journal_title：Biomechanics and modeling in mechanobiology
pub_type： 杂志文章
doi：10.1007/s10237-013-0498-8
更新日期：2014-01-01 00:00:00
abstract：:In this manuscript, we present a combined experimental and computational technique that can identify the heterogeneous elastic properties of planar soft tissues. By combining inverse membrane analysis, digital image correlation, and bulge inflation tests, we are able to identify a tissue's mechanical properties locall...
journal_title：Biomechanics and modeling in mechanobiology
pub_type： 杂志文章
doi：10.1007/s10237-014-0646-9
更新日期：2015-10-01 00:00:00
abstract：:Human embryonic stem cells (hESCs) can differentiate to three germ layers within biochemical and biomechanical niches. The complicated mechanical environments in vivo could have diverse effects on the fate decision and biological functions of hESCs. To globally screen mechanosensitive molecules, three typical types of...
journal_title：Biomechanics and modeling in mechanobiology
pub_type： 杂志文章
doi：10.1007/s10237-020-01378-5
更新日期：2020-08-18 00:00:00
abstract：:The equilibrium shapes of lipid vesicles are perturbed by rigid inclusions. In a two-dimensional vesicle, that may also model a cylindrically elongated tubule, the shape modifications can be determined analytically, and turn out to be significant even far from the inclusion. On the contrary, previous numerical work ha...
journal_title：Biomechanics and modeling in mechanobiology
pub_type： 杂志文章
doi：10.1007/s10237-006-0066-6
更新日期：2007-09-01 00:00:00
abstract：:In this paper, the heat and flow characteristic of third-grade non-Newtonian biofluids flow through a vertical porous human vessel due to peristaltic wall motion are studied. The third-grade model can describe shear thinning (or shear thickening) and normal stress differences, which is acceptable for biofluids modelin...
journal_title：Biomechanics and modeling in mechanobiology
pub_type： 杂志文章
doi：10.1007/s10237-017-0945-z
更新日期：2018-02-01 00:00:00
abstract：:Lymph is transported along collecting lymphatic vessels by intrinsic and extrinsic pumping. The walls have muscle of a type intermediate between blood-vascular smooth muscle and myocardium; a contracting segment between two valves (a lymphangion) constitutes a pump. This intrinsic mechanism is investigated ex vivo in ...
journal_title：Biomechanics and modeling in mechanobiology
pub_type： 杂志文章
doi：10.1007/s10237-017-0933-3
更新日期：2017-12-01 00:00:00
abstract：:Computational studies of chondrocyte mechanics, and cell mechanics in general, have typically been performed using single cell models embedded in an extracellular matrix construct. The assumption of a single cell microstructural model may not capture intercellular interactions or accurately reflect the macroscale mech...
journal_title：Biomechanics and modeling in mechanobiology
pub_type： 杂志文章
doi：10.1007/s10237-017-0951-1
更新日期：2018-02-01 00:00:00
abstract：:Knowledge of the complete three-dimensional (3D) mechanical behavior of soft tissues is essential in understanding their pathophysiology and in developing novel therapies. Despite significant progress made in experimentation and modeling, a complete approach for the full characterization of soft tissue 3D behavior rem...
journal_title：Biomechanics and modeling in mechanobiology
pub_type： 杂志文章
doi：10.1007/s10237-017-0943-1
更新日期：2018-02-01 00:00:00
abstract：:It has been demonstrated that interstitial fluid (IF) flow can play a crucial role in tumor cell progression. Swartz and collaborators (Cancer Cell 11: 526-538, Shields et al. 2007) demonstrated that cells that secrete the lymphoid homing chemokines CCL21/CCL19 and express their receptor CCR7 could use flow to bias th...
journal_title：Biomechanics and modeling in mechanobiology
pub_type： 杂志文章
doi：10.1007/s10237-019-01128-2
更新日期：2019-08-01 00:00:00
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journal_title：Biomechanics and modeling in mechanobiology
pub_type： 杂志文章
doi：10.1007/s10237-017-0884-8
更新日期：2017-08-01 00:00:00
abstract：:Schlemm's canal (SC) endothelial cells are likely important in the physiology and pathophysiology of the aqueous drainage system of the eye, particularly in glaucoma. The mechanical stiffness of these cells determines, in part, the extent to which they can support a pressure gradient and thus can be used to place limi...
journal_title：Biomechanics and modeling in mechanobiology
pub_type： 杂志文章
doi：10.1007/s10237-009-0156-3
更新日期：2010-02-01 00:00:00
abstract：:Bone fracture healing is a complex process in which angiogenesis or the development of a blood vessel network plays a crucial role. In this paper, a mathematical model is presented that simulates the biological aspects of fracture healing including the formation of individual blood vessels. The model consists of parti...
journal_title：Biomechanics and modeling in mechanobiology
pub_type： 杂志文章
doi：10.1007/s10237-010-0241-7
更新日期：2011-06-01 00:00:00
abstract：:We propose and analyse the properties of a new class of models for the electromechanics of cardiac tissue. The set of governing equations consists of nonlinear elasticity using a viscoelastic and orthotropic exponential constitutive law, for both active stress and active strain formulations of active mechanics, couple...
journal_title：Biomechanics and modeling in mechanobiology
pub_type： 杂志文章
doi：10.1007/s10237-019-01237-y
更新日期：2020-04-01 00:00:00
abstract：:Articular cartilages swell and shrink depending on the ionic strength of the electrolyte they are in contact with. This electro-chemo-mechanical coupling is due to the presence of fixed electrical charges on proteoglycans (PGs). In addition, at nonphysiological pH, collagen fibers become charged. Therefore, variation ...
journal_title：Biomechanics and modeling in mechanobiology
pub_type： 杂志文章
doi：10.1007/s10237-009-0158-1
更新日期：2010-02-01 00:00:00
abstract：:The present study examines the possibility of attenuating blood pulses by means of introducing prosthetic viscoelastic materials able to absorb energy and damp such pulses. Vascular prostheses made of polymeric materials modify the mechanical properties of blood vessels. The effect of these materials on the blood puls...
journal_title：Biomechanics and modeling in mechanobiology
pub_type： 杂志文章
doi：10.1007/s10237-017-0980-9
更新日期：2018-04-01 00:00:00
abstract：:The collagen fibril network is an important factor for the depth-dependent mechanical behaviour of adult articular cartilage (AC). Recent studies show that collagen orientation is parallel to the articular surface throughout the tissue depth in perinatal animals, and that the collagen orientations transform to a depth...
journal_title：Biomechanics and modeling in mechanobiology
pub_type： 杂志文章
doi：10.1007/s10237-010-0233-7
更新日期：2011-04-01 00:00:00
abstract：:Locust wings are able to sustain millions of cycles of mechanical loading during the lifetime of the insect. Previous studies have shown that cross veins play an important role in delaying crack propagation in the wings. Do cross veins thus also influence the fatigue behaviour of the wings? Since many important fatigu...
journal_title：Biomechanics and modeling in mechanobiology
pub_type： 杂志文章
doi：10.1007/s10237-017-0930-6
更新日期：2017-12-01 00:00:00
abstract：:Bridging veins (BVs) drain the blood from the cerebral cortex into dural sinuses. BVs have one end attached to the brain and the other to the superior sagittal sinus (SSS), which is attached to the skull. Relative movement between these two structures can cause BV to rupture producing acute subdural haematoma, a head ...
journal_title：Biomechanics and modeling in mechanobiology
pub_type： 杂志文章
doi：10.1007/s10237-020-01349-w
更新日期：2020-12-01 00:00:00
abstract：:This study evaluated the ability of different in vitro mechanical loading tests to promote new mineral formation at bonded dentin interfaces. This research demonstrated a sequential transition in the dentin remineralizing procedure through the analysis of the mineral and matrix gradients. Mechanical loading in phospho...
journal_title：Biomechanics and modeling in mechanobiology
pub_type： 杂志文章
doi：10.1007/s10237-014-0573-9
更新日期：2014-11-01 00:00:00
abstract：:In this study, we hypothesized that spatial relationships exist between the local mechanical environment and inflammatory marker expression in atherosclerotic plaques, and that these relationships are plaque-progression dependent. Histologic cross-sections were collected at regular intervals along the length of diseas...
journal_title：Biomechanics and modeling in mechanobiology
pub_type： 杂志文章
doi：10.1007/s10237-009-0151-8
更新日期：2009-12-01 00:00:00
abstract：:The paper describes the extension of a previously developed model of pressure-dependent contraction rate to the case of multiple lymphangions. Mechanical factors are key modulators of active lymphatic pumping. As part of the evolution of our lumped-parameter model to match experimental findings, we have designed an al...
journal_title：Biomechanics and modeling in mechanobiology
pub_type： 杂志文章
doi：10.1007/s10237-018-1042-7
更新日期：2018-10-01 00:00:00
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journal_title：Biomechanics and modeling in mechanobiology
pub_type： 杂志文章
doi：10.1007/s10237-011-0346-7
更新日期：2012-05-01 00:00:00
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journal_title：Biomechanics and modeling in mechanobiology
pub_type： 杂志文章
doi：10.1007/s10237-004-0054-7
更新日期：2004-11-01 00:00:00
abstract：:In this paper we introduce a novel method for prescribing terminal boundary conditions in one-dimensional arterial flow networks. This is carried out by coupling the terminal arterial vessel with a poro-elastic tube, representing the flow resistance offered by microcirculation. The performance of the proposed porous m...
journal_title：Biomechanics and modeling in mechanobiology
pub_type： 杂志文章
doi：10.1007/s10237-019-01122-8
更新日期：2019-08-01 00:00:00
abstract：:In adaptive bone remodeling, mechanical signals such as stress/strain caused by loading/deformation are believed to play important roles as regulators of the process in which osteoclastic resorption and osteoblastic formation are coordinated under a local mechanical environment. The mechanism by which cells sense and ...
journal_title：Biomechanics and modeling in mechanobiology
pub_type： 杂志文章
doi：10.1007/s10237-003-0029-0
更新日期：2003-11-01 00:00:00
abstract：:The action induced by artificial sphincteric devices to provide urinary continence is related to the problem of evaluating the interaction between the occlusive cuff and the urethral duct. The intensity and distribution of the force induced within the region of application determine a different occlusion process and p...
journal_title：Biomechanics and modeling in mechanobiology
pub_type： 杂志文章
doi：10.1007/s10237-017-0897-3
更新日期：2017-08-01 00:00:00
abstract：:To investigate the relationship between cellular microelasticity and the structural features of cytoskeletons (CSKs), a microindentation test for apical cell membranes and observation of the spatio-distribution of actin CSKs of fibroblasts were performed by fluorescence and atomic force microscopy (FM/AFM). The indent...
journal_title：Biomechanics and modeling in mechanobiology
pub_type： 杂志文章
doi：10.1007/s10237-006-0048-8
更新日期：2006-11-01 00:00:00
abstract：:Nanomechanics of individual collagen fibrils govern the mechanical behavior of the majority of connective tissues, yet the current models lack significant details. Majority of the current models assume a rod-shape molecule with homogenous mechanical properties. Recent X-ray crystallography revealed significantly diffe...
journal_title：Biomechanics and modeling in mechanobiology
pub_type： 杂志文章
doi：10.1007/s10237-014-0615-3
更新日期：2015-06-01 00:00:00
abstract：:Long-term adaptation of soft tissues is realized through growth and remodeling (G&R). Mathematical models are powerful tools in testing hypotheses on G&R and supporting the design and interpretation of experiments. Most theoretical G&R studies concentrate on description of either growth or remodeling. Our model combin...
journal_title：Biomechanics and modeling in mechanobiology
pub_type： 杂志文章
doi：10.1007/s10237-010-0204-z
更新日期：2010-12-01 00:00:00
abstract：:The superficial femoral artery (SFA) is a typical atherosclerosis-prone site. We aimed to explore whether the tortuosity of the SFA associates with the occurrence of atherosclerosis and investigate how vascular tortuosity influences the characteristics of blood flow. Ten patients diagnosed with atherosclerotic disease...
journal_title：Biomechanics and modeling in mechanobiology
pub_type： 杂志文章
doi：10.1007/s10237-019-01118-4
更新日期：2019-08-01 00:00:00
