Effects Of Repeated +Gz Exposures On Cervical Intervertebral Disc In Rabbits

The cervical vertebrae is prone to be hurt due to its unstability and large range of motion. Pilots are usually suffered from cervical syndrome induced by their daily activities in the flight. It was generally considered that the degeneration of intervertebral disc is the main cause of the intervertebral disk hernia. At present, age and injure are believed to be the two important factors which are involved in the degeneration of cervical intervertebral disc . So the degeneration of intervertebral disc is a natural progress related to aging. However, biomechanical forces may induce and promote this process. +Gz of the modern advanced tactical fighter (ATF) has the characteristic of high +Gz value (>9Gz) , high rate of increase (>6G/s) , long sustained time and occurring repeatedly. The vertebrae of pilots in the advanced tactical fighter is exposed to high +Gz values when they are carring out fighting training. Additionally, the burden of their cervical vertebrae is also increased by the helmet and night sight equipment. Thus, the degeneration of intervertebral...