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Lower body angles as output from Plug-in Gait

Lower body angles as output from Plug-in Gait

Owned by Gisela Roberts
Last updated: Dec 08, 2023

The following tables display the lower body segment angles from Plug-in Gait.

All lower body angles are calculated 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.

Left lower body angles

Angles
Positive rotation Axis Direction
LPelvisAngles 1 Anterior Tilt Prg.Fm. Y Anti-clockwise

2 Upward Obliquity Prg.Fm. X' Anti-clockwise

3 Internal Rotation Prg.Fm. Z'' Clockwise
LFootProgressAngles 1 - Prg.Fm. Y -

2 - Prg.Fm. X' -

3 Internal Rotation Prg.Fm. Z'' Clockwise
LHipAngles 1 Flexion Pelvis Y Clockwise

2 Adduction Pelvis X' Clockwise

3 Internal Rotation Pelvis Z'' Clockwise
LKneeAngles 1 Flexion Thigh Y Anti-clockwise

2 Varus/Adduction Thigh X' Clockwise

3 Internal Rotation Thigh Z'' Clockwise
LAnkleAngles 1 Dorsiflexion Tibia Y Clockwise

2 Inversion/ Adduction Tibia X'' Clockwise

3 Internal Rotation Tibia Z' Clockwise

Right lower body angles

Angles
Positive rotation Axis Direction
RPelvisAngles 1 Anterior Tilt Prg.Fm. Y Anti-clockwise

2 Upward Obliquity Prg.Fm. X' Clockwise

3 Internal Rotation Prg.Fm. Z'' Anti-clockwise
RFootProgressAngles 1 - Prg.Fm. Y -

2 - Prg.Fm. X' -

3 Internal Rotation Prg.Fm. Z'' Anti-clockwise
RHipAngles 1 Flexion Pelvis Y Clockwise

2 Adduction Pelvis X' Anti-clockwise

3 Internal Rotation Pelvis Z'' Anti-clockwise
RKneeAngles 1 Flexion Thigh Y Anti-clockwise

2 Varus/Adduction Thigh X' Anti-clockwise

3 Internal Rotation Thigh Z'' Anti-clockwise
RAnkleAngles 1 Dorsiflexion Tibia Y Clockwise

2 Inversion/ Adduction Tibia X'' Anti-clockwise

3 Internal Rotation Tibia Z' Anti-clockwise

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