Neck Flexion Induces Larger Deformation of the Brain Than Extension at a Rotational Acceleration, Closed Head Trauma

Figure 7

Repeated recordings at a low level sagittal flexion closed head rotational acceleration with the sensors in basal ganglia. One FOPT was inserted through the hole in the parietotemporal bone and directed at an angle of 45° rearward (a), while the one through the occipital bone was directed at an angle of 45° forward (b). Thereby the sensor tips were positioned only a few mm apart during the exposure. Similar pressure patterns were obtained whether the sensor was aligned against or along the direction of the sagittal rotational acceleration. The sensors are thus likely to record dynamic pressures generated in the brain parenchyma at the exposure. No obvious indication suggesting that the pressures were related to movements of the FOPTs in the brain tissue.

(a)

(b)