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Mechanistic Insights into Human Brain Impact Dynamics through Modal Analysis
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Biomedical Engineering and Health Systems, Neuronic Engineering.ORCID iD: 0000-0003-0125-0784
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2018 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 120Article in journal (Refereed) Published
Abstract [en]

Although concussion is one of the greatest health challenges today, our physical understanding of the cause of injury is limited. In this Letter, we simulated football head impacts in a finite element model and extracted the most dominant modal behavior of the brain’s deformation. We showed that the brain’s deformation is most sensitive in low frequency regimes close to 30 Hz, and discovered that for most subconcussive head impacts, the dynamics of brain deformation is dominated by a single global mode. In this Letter, we show the existence of localized modes and multimodal behavior in the brain as a hyperviscoelastic medium. This dynamical phenomenon leads to strain concentration patterns, particularly in deep brain regions, which is consistent with reported concussion pathology.

Place, publisher, year, edition, pages
American Physical Society, 2018. Vol. 120
National Category
Applied Mechanics
Identifiers
URN: urn:nbn:se:kth:diva-226287DOI: 10.1103/PhysRevLett.120.138101ISI: 000428783300021Scopus ID: 2-s2.0-85044729383OAI: oai:DiVA.org:kth-226287DiVA, id: diva2:1197825
Funder
Swedish Research Council
Note

QC 20180418

Available from: 2018-04-14 Created: 2018-04-14 Last updated: 2018-04-18Bibliographically approved

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Publisher's full textScopushttps://link.aps.org/doi/10.1103/PhysRevLett.120.138101

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Kleiven, Svein

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