This section demonstrates the evidence behind the choice of the specific value of rotatory motion for different parts of the spine in the traditional anatomical planes. The evidence comes from the in vivo studies of healthy young males.
The literature meta-analysis is presented in the form of graphs that were composed following the uniform logic:
The range of motion implemented in the Anatomy Standard spine model in all traditional planes generally lies within limits between the weighted mean and upper double pooled standard deviation limit (2SD) derived from the in vivo studies. This range approximately corresponds to the part of the population with the average and above the spine's average flexibility, without exceeding the 95 percentile borderline.
ROM of the Cervical Part of the Spine
Flexion of the Cervical Spine
Extension of the Cervical Spine
Flexion + Extension of the Cervical Spine
Lateral Bending of the Cervical Spine
Axial Rotation of the Cervical Spine
ROM of the Thoracic Part of the Spine
Flexion of the Thoracic Spine
Extension of the Thoracic Spine
Flexion – Extension ROM of the thoracic spine
Lateral Bending of the Thoracic Spine
Axial Rotation of the Thoracic Spine
ROM of the Lumbar Part of the Spine
Flexion of the Lumbar Spine
Extension of the Lumbar Spine
Flexion + Extension of the Lumbar Spine
Lateral bending of the Lumbar Spine
Axial Rotation of the Lumbar Spine
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