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. 2015 Jun 26;59(1):48–60. doi: 10.1080/00140139.2015.1051598

Table 2 . Description of the neutral and non-neutral categories for five degrees of freedom (upper body).

  Body region
Category Head inclination (sagittal) Neck torsion (lateral) Trunk inclination (sagittal) Trunk inclination (lateral) Back torsion (lateral)
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Neutral 0°–25°, < 0° full head support  − 45°–45° 0°–20°, < 0° full back support 0°–10°  − 10°–10°
Non-neutral  <  0° or > 25°  < − 45° or >45°  <  0° or > 20°  < − 10 or > 10°  < − 10 or > 10°