TY  - JOUR
PY  - 2015//
TI  - Resonance of human brain under head acceleration
JO  - Journal of the Royal Society, Interface
A1  - Laksari, Kaveh
A1  - Wu, Lyndia C.
A1  - Kurt, Mehmet
A1  - Kuo, Calvin
A1  - Camarillo, David C.
SP  - e331
EP  - e331
VL  - 12
IS  - 108
N2  - Although safety standards have reduced fatal head trauma due to single severe head impacts, mild trauma from repeated head exposures may carry risks of long-term chronic changes in the brain's function and structure. To study the physical sensitivities of the brain to mild head impacts, we developed the first dynamic model of the skull-brain based on in vivo MRI data. We showed that the motion of the brain can be described by a rigid-body with constrained kinematics. We further demonstrated that skull-brain dynamics can be approximated by an under-damped system with a low-frequency resonance at around 15 Hz. Furthermore, from our previous field measurements, we found that head motions in a variety of activities, including contact sports, show a primary frequency of less than 20 Hz. This implies that typical head exposures may drive the brain dangerously close to its mechanical resonance and lead to amplified brain-skull relative motions. Our results suggest a possible cause for mild brain trauma, which could occur due to repetitive low-acceleration head oscillations in a variety of recreational and occupational activities.<p />  <p>Language: en</p>
LA  - en
SN  - 1742-5689
UR  - http://dx.doi.org/10.1098/rsif.2015.0331
ID  - ref1
ER  -