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Table 1 Frequency analysis cross-tabulated by task and vibration axis.

From: The effects of head movement on dual-axis cervical accelerometry signals

  A-P direction S-I direction
Tasks f p f c BW f p f c BW
1. Tilt left 0.52 ± 0.19 6.62 ± 7.85 19.5 ± 4.33 0.59 ± 0.22 5.23 ± 3.74† 15.5 ± 5.06
2. Tilt right 0.53 ± 0.19 5.40 ± 5.99 17.9 ± 4.99 0.70 ± 0.37 6.58 ± 4.47† 20.1 ± 4.24
3. Tilt down 0.50 ± 0.11 2.12 ± 1.36 18.3 ± 6.73 0.61 ± 0.27 8.26 ± 5.06† 27.5 ± 7.86†
4. Tilt back 0.62 ± 0.25 1.69 ± 1.15 15.0 ± 3.16 0.64 ± 0.27 7.96 ± 6.96† 27.3 ± 4.22†
5. Rotate 0.57 ± 0.18 2.68 ± 1.85 29.2 ± 8.35 0.67 ± 0.22 6.88 ± 5.59† 31.4 ± 5.93
Overall 0.55 ± 0.18 3.70 ± 3.63 19.9 ± 18.5 0.64 ± 0.28 6.98 ± 5.15† 24.3 ± 21.1
  1. Entries represent mean values plus/minus mean average deviations in Hz.
  2. † Significantly different from the A-P direction