Grant W, Best W
Engineering Science and Mechanics Department, Virginia Polytechnic Institute and State University, Blacksburg 24061.
Aviat Space Environ Med. 1987 Oct;58(10):970-6.
The otolith organs comprise a second-order system whose response is overdamped and whose dynamics can be expressed by two time constants. The long time constant has been experimentally measured at 10 s. The short time constant is approximately 0.0002 s using a maximum mechanical displacement criterion for the otoconial layer. With these two values determined, the system dynamic response indicates that, between the two system corner frequencies, the peripheral sensory cells (primary Type II cells) report skull velocity information to the central nervous system, and striolar cells (primary Type I cells) report skull acceleration information to the central nervous system. Below the lower corner frequency, peripheral sensory cells report skull acceleration information to the central nervous system, and striolar sensory cells report rate of change of acceleration information to the central nervous system.
耳石器官构成一个二阶系统，其响应是过阻尼的，其动力学可用两个时间常数来表示。长时间常数经实验测量为10秒。使用耳石层的最大机械位移标准时，短时间常数约为0.0002秒。确定这两个值后，系统动态响应表明，在两个系统转折频率之间，外周感觉细胞（主要是II型细胞）向中枢神经系统报告颅骨速度信息，而纹状区细胞（主要是I型细胞）向中枢神经系统报告颅骨加速度信息。在较低转折频率以下，外周感觉细胞向中枢神经系统报告颅骨加速度信息，而纹状区感觉细胞向中枢神经系统报告加速度变化率信息。
