Mass, Volume, Center of Mass and Mass Moment of Inertia of Head and Head and Neck of the Human Body

Walker, Leon B.; Harris, Edward; Pontius, Uwe R.

doi:10.21236/ad0762581

Cited by 10 publications

(6 citation statements)

References 0 publications

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“…The neck COM is difficult to compare, because of the difference in the location of the axes. The head MOI (Table 3) estimated for our model is in good agreement with that from literature (18,29,30,32,33), while the neck MOI is higher than that reported by McConville et al (32). This could be because of the differences in the definitions of the neck segment or the measurement method.…”

Section: Resultssupporting

confidence: 90%

“…Our voxelized segmentation method captures the fine details of the anthropometry body variation without approximation and offers better representation of mass and inertia properties. The calculated mass of the head and neck for the 50 th percentile male and female model (Table 3), based on the volumetric segmentation in Fig 3 and Fig 4, agreed well with literature (18,29–31). The COM of the head and neck is further forward and higher than that reported by (32), (29), and (33), even though the axes definitions are similar to that in our model.…”

Section: Resultssupporting

confidence: 84%

“…The local rotational axes for head and neck are also shown. Planes of separation of the neck from the torso and the head are based on the rules by Walker et al (18).…”

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Neck Musculoskeletal Model Generation through Anthropometric Scaling

Roos

Vasavada

Zheng

et al. 2019

Preprint

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Neck Musculoskeletal Model Generation through Anthropometric Scaling 2 ABSTRACT A new methodology was developed to quickly generate whole body models with detailed neck musculoskeletal architecture that are properly scaled in terms of anthropometry and muscle strength. This method was implemented in an anthropometry model generation software that allows users to interactively generate any new male or female musculoskeletal models with adjustment of anthropometric parameters (such as height, weight, neck circumference, and neck length) without the need of subject-specific motion capture or medical images. 50 th percentile male and female models were developed based on the 2012 US Army Anthropometric Survey (ANSUR II) database and optimized with a novel bilevel optimization method to have strengths comparable to experimentally measured values in the literature. Other percentile models (ranging from the 1 st to 99 th percentile) were generated based on anthropometric scaling of the 50 th percentile models and compared. The resultant models are reasonably accurate in terms of both musculoskeletal geometry and neck strength, demonstrating the effectiveness of the developed methodology for interactive neck model generation with anthropometric scaling.

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Section: Resultssupporting

confidence: 90%

Section: Resultssupporting

confidence: 84%

See 1 more Smart Citation

Neck Musculoskeletal Model Generation through Anthropometric Scaling

Roos

Vasavada

Zheng

et al. 2019

Preprint

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“…Since C1 does not have a vertebral body, no rod was inserted at this level. A surrogate head with a mass of 3.3 kg and sagittal plane moment of inertia of 0.016 kg m 2 was attached to the occipital mount (Becker, 1972;Walker et al, 1973). The MFR system consisted of anterior, posterior and eight lateral cables attached to springs anchored to the base, each pre-loaded to 30 N. Anterior and posterior cables originated at the occipital mount, ran along the anterior and posterior aspects of the specimen, and were connected to the springs.…”

Section: Incremental Whiplash Simulationmentioning

confidence: 99%

Cervical spine curvature during simulated whiplash

Panjabi

Pearson

Ito

et al. 2004

Clinical Biomechanics

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“…This would add two terms (I xz a z ea x dt and I xz a x e a z dt) in equations 6 and 7. In the case of the human head, the power terms containing the products of inertia I xy , I xz and I yz are insignificant compared to the moments of inertia I xx , I yy , and I zz (Becker, 1972;Walker et al, 1973). Nevertheless, these terms in the PI could be estimated using the FE model.…”

Section: Impact Direction In Prediction Of Subdural Hematomamentioning

confidence: 99%

Influence of Impact Direction on the Human Head in Prediction of Subdural Hematoma

Kleiven

2003

Journal of Neurotrauma

159

106

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The objective of the present study was to analyze the effect of different loading directions following impact, and to evaluate existing global head injury criteria. Detailed and parameterized models of the adult human head were created by using the Finite Element Method (FEM). Loads corresponding to the same impact power were imposed in different directions. Furthermore, the Head Injury Criterion (HIC) and the recently proposed Head Impact Power (HIP) criterion were evaluated with respect to the relative motion between the skull and the brain, as well as the strain in the bridging veins. It was found that the influence of impact direction had a substantial effect on the intracranial response. The largest relative skull-brain motion and strain in the bridging veins occurred with the anterior-posterior (AP) and posterior-anterior (PA) rotational impulses. HIC was unable to predict consequences of a pure rotational impulse while HIP needed individual scaling coefficients for the different terms to account for difference in load direction. When using the proposed scaling procedure, a better prediction of subdural hematoma (SDH) was obtained. It is thus suggested that an evaluation of the synergistic terms is necessary to further improve the injury prediction. These variations should be considered when developing new head injury criteria.

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Mass, Volume, Center of Mass and Mass Moment of Inertia of Head and Head and Neck of the Human Body

Cited by 10 publications

References 0 publications

Neck Musculoskeletal Model Generation through Anthropometric Scaling

Neck Musculoskeletal Model Generation through Anthropometric Scaling

Cervical spine curvature during simulated whiplash

Influence of Impact Direction on the Human Head in Prediction of Subdural Hematoma

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