Related Experiment Video
Updated: Dec 18, 2025
07:03
Author Spotlight: Bridging the Gap Between In Vivo and Ex Vivo Studies with the "Avatar" Technique to Advance Muscle Mechanics Research
Published on: August 18, 2023
1.2K
Passive load-deformation properties of human temporal muscle
J Zwirner1, B Ondruschka2, M Scholze3
1Department of Anatomy, University of Otago, Dunedin, New Zealand.
Journal of Biomechanics
|June 11, 2020
Summary
The biomechanical properties of human temporal muscle are consistent across age, sex, and body side. These findings are crucial for accurate computer simulations of the human head and soft tissue modeling.
Area of Science:
- Biomechanics
- Biomaterials Science
- Computational Modeling
Background:
- The passive load-deformation properties of the human temporal muscle are largely unexplored for computational simulations.
- It remains unclear if these properties are influenced by demographic or biological factors like age, sex, post-mortem interval, or body side.
Purpose of the Study:
- To investigate and characterize the passive load-deformation properties of human temporal muscle.
- To determine the influence of age, sex, post-mortem interval, and body side on these properties.
- To compare the mechanical behavior of temporal muscle with surrounding tissues like fascia and scalp for improved computational head models.
Main Methods:
- Quasi-static tensile testing was performed on 88 human temporal muscle samples from 69 cadavers.
- Comparative analysis included 20 age-matched samples of temporal muscle fascia and scalp.
- Mechanical parameters such as elastic modulus, ultimate tensile strength, and strain at maximum force were measured.
Main Results:
- Human temporal muscle exhibited an elastic modulus of 1.58 ± 0.64 MPa, ultimate tensile strength of 0.26 ± 0.11 MPa, and strain at maximum force of 26.21 ± 12.48%.
- These biomechanical parameters were found to be independent of sex, body side, and post-mortem interval.
- Temporal muscle showed distinct load-deformation properties compared to temporal muscle fascia and scalp, except for strain at maximum force.
Conclusions:
- The distinct biomechanical properties of temporal muscle necessitate separate simulation of this soft tissue layer in computational head models.
- Unlike other tissues, temporal muscle properties in head models may not require adjustments for sex, side, or age.
- These findings contribute to more realistic biomechanical simulations of the human head and provide data for graft material comparisons.
Related Concept Videos
01:11Deformation of Member under Multiple Loadings
386
When a rod is made of different materials or has various cross-sections, it must be divided into parts that meet the necessary conditions for determining the deformation. These parts are each characterized by their internal force, cross-sectional area, length, and modulus of elasticity. These parameters are then used to compute the deformation of the entire rod.
In the case of a member with a variable cross-section, the strain is not constant but depends on the position. The deformation of an...
In the case of a member with a variable cross-section, the strain is not constant but depends on the position. The deformation of an...
386
01:15Relation between Poisson's ratio, Modulus of Elasticity and Modulus of Rigidity
461
Deformation occurs in axial and transverse directions when an axial load is applied to a slender bar. This deformation impacts the cubic element within the bar, transforming it into either a rectangular parallelepiped or a rhombus, contingent on its orientation. This transformation process induces shearing strain. Axial loading elicits both shearing and normal strains. Applying an axial load instigates equal normal and shearing stresses on elements oriented at a 45° angle to the load axis.
461
01:20Normal Strain under Axial Loading
1.0K
Normal strain under axial loading is an important concept in the field of mechanics of materials. Axial loading implies the application of a force along the axis of a material, like a column or bar. This force can either compress or stretch the material. In the context of axial loading, normal strain is the deformation experienced by the material in the direction of the loading force. It's calculated as the change in length divided by the original length of the material. This unitless ratio...
1.0K
01:12Temperature Dependent Deformation
314
In a nonhomogeneous rod made up of steel and brass, restrained at both ends and subjected to a temperature change, several steps are involved in calculating the stress and compressive load. Due to the problem's static indeterminacy, one end support is disconnected, allowing the rod to experience the temperature change freely. Next, an unknown force is applied at the free end, triggering deformations in the rod's steel and brass portions. These deformations are then calculated and added...
314
01:20Motor Unit Stimulation
3.4K
When the neuron of a motor unit fires an action potential, it triggers a series of events, leading to a twitch contraction in the muscle fibers. The process of excitation-contraction coupling is crucial in relaying the action potential to the muscle fibers.
The latent period of contraction marks the onset of excitation-contraction coupling, when the action potential propagates across the sarcolemma, preparing the muscle fibers for contraction. As the fibers enter the contraction phase, the...
The latent period of contraction marks the onset of excitation-contraction coupling, when the action potential propagates across the sarcolemma, preparing the muscle fibers for contraction. As the fibers enter the contraction phase, the...
3.4K
01:22Generalized Hooke's Law
2.5K
The generalized Hooke's Law is a broadened version of Hooke's Law, which extends to all types of stress and in every direction. Consider an isotropic material shaped into a cube subjected to multiaxial loading. In this scenario, normal stresses are exerted along the three coordinate axes. As a result of these stresses, the cubic shape deforms into a rectangular parallelepiped. Despite this deformation, the new shape maintains equal sides, and there is a normal strain in the direction of the...
2.5K