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Blast-induced mild traumatic brain injury through ear canal: A finite element study

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Blast-induced mild traumatic brain injury through ear canal: A finite element study

Content Provider	Springer Nature Link
Author	Akula, Praveen Hua, Yi Gu, Linxia
Copyright Year	2015
Abstract	The role of ear canal in transmitting blast waves to the brain is not clear. The goal of this work is to characterize the influence of ear canal on blast-induced mild traumatic brain injury through a computational approach.A three-dimensional human head model with single-side ear canal details was reconstructed from computed tomography images. The ear canal was positioned either facing the incident blast wave or facing away from the blast wave.The blast wave-head interaction has demonstrated that the overpressure within the ear canal was substantially amplified when the ear directly faced the blast wave. When it faced away from the blast wave, the overpressure within the ear canal was less than the actual incident blast pressure. Regardless of the substantial pressure differences within the ear canal induced by the blast wave, the resulting intracranial pressures were almost the same for both cases.The blast wave-head interaction has demonstrated that the role of the ear canal in brain dynamics, and thus brain injury, was negligible. However, the peak overpressure within the ear canal exceeded the documented tympanic membrane rupture and inner ear damage thresholds. This was speculated to cause the degeneration of axons along the auditory pathway up to the midbrain. This work provided fundamental understanding of the load transmission through the ear canal and could serve as a platform for designing better protective armors.
Starting Page	281
Ending Page	288
Page Count	8
File Format	PDF
ISSN	20939868
Journal	Biomedical Engineering Letters
Volume Number	5
Issue Number	4
e-ISSN	2093985X
Language	English
Publisher	The Korean Society of Medical and Biological Engineering
Publisher Date	2016-01-12
Publisher Place	Korea
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Ear canal Blast Traumatic brain injury Finite element modeling Stress transfer Biomedical Engineering Biophysics and Biological Physics Biomedicine general Medical and Radiation Physics
Content Type	Text
Resource Type	Article
Subject	Biomedical Engineering

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