User guide

Charnwood Dynamics Ltd. Coda cx1 User Guide - Gait Analysis II - 1
CX1 USER GUIDE - COMPLETE.doc 26/04/04 67/162
Segment Reference Points
These are rigid model anatomical sites calculated from the marker positions in conjunction
with information about static widths and depths from Patient Data. All Segment Reference
Points are shown, pre-joined in a factory set configuration, on any stick-figure view; plots
of their positions may be selected from the graph-plot menu lists.
The Pelvis Model is a set of 5 reference points derived from 3 pelvic frame markers. The
5 points are:
Sacrum
LeftA.S.I.S.
RightA.S.I.S.
LeftHipJointCentre
RightHipJointCentre
Leg reference points for either left or right legs are:
LateralKnee
KneeCentre
MedialKnee
LateralAnkle
AnkleCentre
MedialAnkle
Heel
Toe
[ Also VirtualHip; at present this is merely a cosmetic feature.]
Leg reference points are calculated only if both leg and pelvic frame marker data are
available. Only one set of leg reference points is calculated for unilateral data (Left or
Right is detected automatically). For bilateral data reference points for both legs are
calculated and labelled accordingly.