What are the Lower Body Segment angles from Plug-in Gait?

The table below displays the Lower Body Segment angles from Plug-in Gait.

All Lower Body angles are calculate in rotation order YXZ except for Ankle Angles which are calculated in order YZX.

As Euler angles are calculated, each rotation causes the axis for the subsequent rotation to be shifted. X’ indicates an axis which has been acted upon and shifted by one previous rotation, X’’ indicates a rotation axis which has been acted upon and shifted by two previous rotations.

Angles Positive Rotation Axis Direction Angles Positive Direction Axis Direction
LPelvisAngles 1 Anterior Tilt Prg.Fm. Y Anti-clockwise RPelvisAngles 1 Anterior Tilt Prg.Fm. Y Anti-clockwise
2 Upward Obliquity Prg.Fm. X’ Anti-clockwise 2 Upward Obliquity Prg.Fm. X’ Clockwise
3 Internal Rotation Prg.Fm. Z’’ Clockwise 3 Internal Rotation Prg.Fm. Z’’ Anti-clockwise
LFootProgressAngles 1 - Prg.Fm. Y RFootProgressAngles 1 - Prg.Fm. Y -
2 - Prg.Fm. X’ 2 - Prg.Fm. X’ -
3 Internal Rotation Prg.Fm. Z’’ Clockwise 3 Internal Rotation Prg.Fm. Z’’ Anti-clockwise
LHipAngles 1 Flexion Pelvis Y Clockwise RHipAngles 1 Flexion Pelvis Y Clockwise
2 Adduction Pelvis X’ Clockwise 2 Adduction Pelvis X’ Anti-clockwise
3 Internal Rotation Pelvis Z’’ Clockwise 3 Internal Rotation Pelvis Z’’ Anti-clockwise
LKneeAngles 1 Flexion Thigh Y Anti-clockwise RKneeAngles 1 Flexion Thigh Y Anti-clockwise
2 Varus/Adduction Thigh X’ Clockwise 2 Varus/Adduction Thigh X’ Anti-clockwise
3 Internal Rotation Thigh Z’’ Clockwise 3 Internal Rotation Thigh Z’’ Anti-clockwise
LAnkleAngles 1 Dorsiflexion Tibia Y Clockwise RAnkleAngles 1 Dorsiflexion Tibia Y Clockwise
2 Inversion/ Adduction Tibia X’’ Clockwise 2 Inversion/ Adduction Tibia X’’ Anti-clockwise
3 Internal Rotation Tibia Z’ Clockwise 3 Internal Rotation Tibia Z’ Anti-clockwise
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