Figure 1 ； Video File

Figure 2 : Anatomical orthogonal coordinate system Z Y +RY ： Left Axial Rotation -RY: Right Axial Rotation +RZ ： Right Lateral Bending -RZ: Left Lateral Bending +RX ： Flexion -RX: Extension +TY ： Superior Translation -TY ： Inferior Translation +TY ： Anterior Translation -TY ： Posterior Translation +TY ： Left Translation -TY ： Right Translation

Figure 3 ; Video Files Video File

Figure 4 ;c2/3_rotations Left Axial Rotation Right Axial Rotation Extension Left Lateral Bending Right Lateral Bending Extension

Figure 4 ;c3/4_rotations Left Axial Rotation Right Axial Rotation Extension Left Lateral Bending Right Lateral Bending Extension

Figure 4 ;c4/5_rotations Left Axial Rotation Right Axial Rotation Extension Left Lateral Bending Right Lateral Bending Extension

Figure 4 ;c5/6_rotations Left Axial Rotation Right Axial Rotation Flexion Left Lateral Bending Right Lateral Bending Flexion

Figure 4 ;c6/7_rotations Left Axial Rotation Right Axial Rotation Flexion Left Lateral Bending Right Lateral Bending Flexion

Figure 4 ;c7/th1_rotations Left Axial Rotation Right Axial Rotation Flexion Left Lateral Bending Right Lateral Bending Flexion

Figure 4 ;c2/3_translations

Figure 4 ;c3/4_translations Left translation Right translation

Figure 4 ;c4/5_translations Left translation Right translation

Figure 4 ;c5/6_translations Left translation Right translation

Figure 4 ;c6/7_translations Left translation Right translation

Figure 4 ;c7/th1_translations Left translation Right translation

TX TY TZ RX RY RZ

RX RY RZ TX TY TZ Layout of Figure 4 Rotations Translations

Figure 5 Neutral Left RotationRight Rotation Left Coupled Lateral Bending Right Coupled Lateral Bending

NeutralLeft RotationRight Rotation Left Coupled Lateral Bending Right Coupled Lateral Bending