Fig. 1A–C.

A representative image (A) showing a rat on the test setup with the platform and the cervical pin and the accelerometer that are both rigidly inserted into the spine. The arrow indicates that the direction of vibration is along the long axis of the rat’s spine. The transmissibility profiles are separately calculated using data derived from the accelerometer (B) and the video imaging system (C); the peak transmissibility is between 8 Hz and 10 Hz, which are greater than all other frequencies (*p < 0.03) but not different from each other.