Appendix C - Joint angles

General rotation sequence is X, Y, Z.

Exception: absolute angles relative to the lab (Pelvis Angle, Thorax-Lab Angle) use Z, Y, X (Baker, 2001, Gait and Posture 13).

 

Joint

Segment/ Reference

Negate?  

Joint

Segment/ Reference

Negate?

Left Shoulder Angles

LAR/RTA

X=FALSE Y=TRUE Z=TRUE

  Right Shoulder Angles RAR/RTA

X=FALSE Y=FALSE Z=FALSE

Left Elbow Angles

LFA/LAR

X=FALSE Y=TRUE Z=TRUE

  Right Elbow Angles RFA/RAR

X=FALSE Y=FALSE Z=FALSE

Left Thorax Angles

RTA/RPV

X=TRUE Y=FALSE Z=TRUE

  Right Thorax Angles RTA/RPV

X=TRUE Y=TRUE Z=FALSE

Left Thorax Lab Angles* RTA/Virtual Lab X=TRUE Y=FALSE Z=TRUE   Right Thorax Lab Angles* RTA/Virtual Lab X=TRUE Y=TRUE Z=FALSE

Left Pelvic Angles*

RPV/Virtual Lab

X=TRUE Y=FALSE Z=TRUE

  Right Pelvic Angles*

RPV/

Virtual Lab

X=TRUE Y=TRUE Z=FALSE

Left Hip Angles

LTH/RPV

X=FALSE Y=TRUE Z=TRUE

  Right Hip Angles RTH/RPV

X=FALSE Y=FALSE Z=FALSE

Left Knee Angles

LSK/LTH

X=TRUE Y=TRUE Z=TRUE

  Right Knee Angles RSK/RTH

X=TRUE Y=FALSE Z=FALSE

Left Ankle Angles

LMF/LSK**

X=FALSE Y=TRUE Z=TRUE

  Right Ankle Angles RMF/RSK**

X=FALSE Y=FALSE Z=FALSE

Left Foot Progression

LMF/

Virtual Lab

X=FALSE Y=FALSE Z=TRUE

  Right Foot Progression

RMF/

Virtual Lab

X=FALSE Y=FALSE Z=FALSE

*Uses Z,Y,X rotation sequence.

**If session option "normalise to static trial" is activated, the segment Left Foot Normalized is used instead of LMF.

 

Joint Segment

Resolution

coordinate

system

Negate?   Joint Segment

Resolution

coordinate

system

Negate?
Left Hip Moment LTH RPV

X=TRUE Y=FALSE Z=FALSE

  Right Hip Moment RTH RPV

X=TRUE Y=TRUE Z=TRUE

Left Knee Moment LSK LTH

X=FALSE Y=FALSE Z=FALSE

  Right Knee Moment RSK RTH

X=FALSE Y=TRUE Z=TRUE

Left Ankle Moment

LFT

LSK

X=TRUE Y=FALSE Z=FALSE

  Right Ankle Moment

RFT

RSK

X=TRUE Y=TRUE Z=TRUE

Left Hip Power LTH RPV

X=FALSE Y=FALSE Z=FALSE

  Right Hip Power RTH RPV

X=FALSE Y=FALSE Z=FALSE

Left Knee Power LSK LTH

X=FALSE Y=FALSE Z=FALSE

  Right Knee Power RSK RTH

X=FALSE Y=FALSE Z=FALSE

Left Ankle Power LFT LSK

X=FALSE Y=FALSE Z=FALSE

  Right Ankle Power RFT RSK

X=FALSE Y=FALSE Z=FALSE

Left GRF LFT Virtual Lab

X=FALSE Y=FALSE Z=FALSE

  Right GRF RFT Virtual Lab

X=TRUE Y=FALSE Z=FALSE