Type

Journal Article

Authors

Michael D. Gilchrist
Michael D Cusimano
Aynsley Smith
Susan E Brien
Shawn Marshall
T Blaine Hoshizaki
Philippe Rousseau
Andrew Post
Clara Karton
R Anna Oeur

Subjects

Engineering

Topics
university college dublin brain tissue dynamic response dynamic strain finite element analysis hybrid iii headform stress response brain concussion

A comparison of head dynamic response and brain tissue stress and strain using accident reconstructions for concussion, concussion with persistent postconcussive symptoms, and subdural hematoma. (2015)

Abstract OBJECT Concussions typically resolve within several days, but in a few cases the symptoms last for a month or longer and are termed persistent postconcussive symptoms (PPCS). These persisting symptoms may also be associated with more serious brain trauma similar to subdural hematoma (SDH). The objective of this study was to investigate the head dynamic and brain tissue responses of injury reconstructions resulting in concussion, PPCS, and SDH. METHODS Reconstruction cases were obtained from sports medicine clinics and hospitals. All subjects received a direct blow to the head resulting in symptoms. Those symptoms that resolved in 9 days or fewer were defined as concussions (n = 3). Those with symptoms lasting longer than 18 months were defined as PPCS (n = 3), and 3 patients presented with SDHs (n = 3). A Hybrid III headform was used in reconstruction to obtain linear and rotational accelerations of the head. These dynamic response data were then input into the University College Dublin Brain Trauma Model to calculate maximum principal strain and von Mises stress. A Kruskal-Wallis test followed by Tukey post hoc tests were used to compare head dynamic and brain tissue responses between injury groups. Statistical significance was set at p < 0.05. RESULTS A significant difference was identified for peak resultant linear and rotational acceleration between injury groups. Post hoc analyses revealed the SDH group had higher linear and rotational acceleration responses (316 g and 23,181 rad/sec(2), respectively) than the concussion group (149 g and 8111 rad/sec(2), respectively; p < 0.05). No significant differences were found between groups for either brain tissue measures of maximum principal strain or von Mises stress. CONCLUSIONS The reconstruction of accidents resulting in a concussion with transient symptoms (low severity) and SDHs revealed a positive relationship between an increase in head dynamic response and the risk for more serious brain injury. This type of relationship was not found for brain tissue stress and strain results derived by finite element analysis. Future research should be undertaken using a larger sample size to confirm these initial findings. Understanding the relationship between the head dynamic and brain tissue response and the nature of the injury provides important information for developing strategies for injury prevention.
Collections Ireland -> University College Dublin -> PubMed

Full list of authors on original publication

Michael D. Gilchrist, Michael D Cusimano, Aynsley Smith, Susan E Brien, Shawn Marshall, T Blaine Hoshizaki, Philippe Rousseau, Andrew Post, Clara Karton, R Anna Oeur

Experts in our system

1
M. D. Gilchrist
University College Dublin
Total Publications: 172
 
2
Michael D Cusimano
University College Dublin
Total Publications: 6
 
3
Susan Brien
University College Dublin
Total Publications: 5
 
4
Shawn Marshall
University College Dublin
Total Publications: 5
 
5
Thomas Blaine Hoshizaki
University College Dublin
Total Publications: 31
 
6
Philippe Rousseau
University College Dublin
Total Publications: 3
 
7
Andrew Post
University College Dublin
Total Publications: 29
 
8
Clara M. Karton
University College Dublin
Total Publications: 6