Table 2.
Accelerometry findings at the mastoid site
| Acceleration backward | Acceleration forward | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Fz plus | Inion minus | Inion plus | Fz minus | |||||||||
| X | Y | Z | X | Y | Z | X | Y | Z | X | Y | Z | |
| Ons (ms) | ||||||||||||
| Mean | 2.09** | 1.53# | 2.18** | 2.14** | 1.69 | 2.09 | 2.31** | 1.79 | 2.32* | 1.98* | 1.53# | 2.09** |
| SD | 0.54 | 0.41 | 0.43 | 0.39 | 0.26 | 0.78 | 0.30 | 0.38 | 0.67 | 0.54 | 0.39 | 0.43 |
| Peak 1 lat (ms) | ||||||||||||
| Mean | 4.99**† | 3.98# | 4.44*## | 4.86** | 4.11 | 4.89** | 5.08** | 4.26 | 4.96** | 5.06**†† | 3.89# | 4.41**## |
| SD | 0.46 | 0.26 | 0.73 | 0.56 | 0.56 | 0.61 | 0.35 | 0.48 | 0.74 | 0.57 | 0.32 | 0.64 |
| Ons-peak 1 amp (g) | ||||||||||||
| Mean | 0.06** | 0.05 | 0.03 | 0.05** | 0.04 | 0.03 | 0.06** | 0.04* | 0.03 | 0.05** | 0.04 | 0.03 |
| SD | 0.03 | 0.03 | 0.02 | 0.02 | 0.02 | 0.01 | 0.02 | 0.02 | 0.01 | 0.03 | 0.03 | 0.02 |
Ons onset, Lat latency, Sh mini-shaker, g = 9.81 m s−2
# and ## statistical significance level at P < 0.05 and P < 0.01 for shorter latencies of the acceleration onsets and the first peaks on the Y and Z axes for stimuli applied to Fz in the between-conditions comparisons
* and ** statistical significance level at P < 0.05 and P < 0.01, respectively, for longer latencies of the acceleration onsets and the first peaks on the X and Z axes compared to the Y axis in the within-conditions comparisons
† and †† statistical significance level at P < 0.05 and P < 0.01, respectively, for longer latencies of the acceleration first peaks on the X axis compared to the Z axis in the within-conditions comparisons
* and ** statistical significance level at P < 0.05 and P < 0.01, respectively, for higher amplitudes of the first acceleration peaks on the X and the Y axes compared to the Z axis in the within-conditions comparisons