Applied Bionics and Biomechanics / 2019 / Article / Tab 2

Research Article

Gait Characteristics of Children with Spastic Cerebral Palsy during Inclined Treadmill Walking under a Virtual Reality Environment

Table 2

Segment coordination systems.

SegmentDefinition of the segment coordination system

PelvisOriginMidpoint between hip joint centers
XUnit vector of cross product between the -axis and the vector from right hip joint center to left hip joint center
YUnit vector defined by the -axis and -axis to create a right-hand coordinate system
ZUnit vector parallel to the line from S1/L5 to the midpoint between left and right shoulder joint centers
TorsoOriginThoracolumbar joint center
XUnit vector perpendicular to the plane formed by the -axis and the vector from right shoulder joint center to left shoulder joint center
YUnit vector defined by the -axis and -axis to create a right-hand coordinate system
ZUnit vector parallel to the line from S1/L5 to the midpoint between left and right shoulder joint centers
ThighOriginHip joint center
XUnit vector perpendicular to the -axis lies in the global sagittal plane and points anteriorly
YUnit vector defined by the -axis and -axis to create a right-hand coordinate system
ZUnit vector from knee joint center to hip joint center
ShankOriginKnee joint center
XUnit vector perpendicular to the -axis lies in the global sagittal plane and points anteriorly
YUnit vector defined by the -axis and -axis to create a right-hand coordinate system
ZUnit vector from ankle joint center to knee joint center
FootOriginSubtalar joint center
XUnit vector perpendicular to the -axis lies in the global sagittal plane and points anteriorly
YUnit vector defined by the -axis and -axis to create a right-hand coordinate system
ZUnit vector from toe joint center to subtalar joint center

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