Dynamic response of the human cadaver head compared to a simple mathematical model

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Hodgson, V. R.¹; Patrick, L. M.¹

Dynamic response of the human cadaver head compared to a simple mathematical model

Proceedings of the 12th Stapp Car Crash Conference

Affiliations

¹Wayne State University
Abstract

It is shown that the response of the occiput of a cadaver to sinusoidal vibration input to the frontal bone corresponds closely to that of a simple damped spring-mass system having a natural frequency equal to the first mode frequency of the skull, 0.17 damping factor. The first and third bending mode of the skull occurred near 300 and 900 Hz for both the cadaver preparation with silicon gel filled cranial cavity and the live human head. A second mode was found near 600 Hz in the live human. Head acceleration levels at which opposite pole pressure reached near —1 atm were 170 g and 500–600 g in the human cadaver and live monkey head, respectively, which values are roughly inversely proportional to major intracranial diameters. A method is derived for comparing the impact response of a simple system to a general shaped pulse to that of the cadaver head. Under certain impact conditions it is found that a simple model responds to cadaver force-time input within 5% of cadaver occiput response over a broad range of pulse durations and acceleration levels.
Links

DOI: 10.4271/680784

SAE: 680784

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Year	Entry
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Cited By (21)

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2014	Patton DA. The Biomechanical Determinants of Sports-Related Concussion: Finite Element Simulations of Unhelmeted Head Impacts to Evaluate Kinematic and Tissue-Level Predictors of Injury and Investigate the Design Implications for Soft-Shell Headgear [PhD thesis]. University of New South Wales; March 2014.
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2023	Merko P. Mechanical Response of the Craniofacial Skeleton to Subfracture Impacts in the Time and Frequency Domains [Master's thesis]. University of Western Ontario; 2023.