Validity and Reliability of Upper Limb Functional Assessment Using the Microsoft Kinect V2 Sensor

Table 1

The upper arm and torso anatomical segment coordinate systems for the Vicon system.

Name		Definition
Torso	Origin	C7
	X	Unit vector defined by the -axis and the -axis to create a right-hand coordinate system
	Y	Unit vector going from T10 to C7
	Z	Unit vector perpendicular to the sagittal plane defined by T10, C7, and CLAV, pointing laterally
Right upper arm	Origin	The elbow joint center, which was the midpoint between EL and EM
	X	Unit vector perpendicular to the -axis and the -axis, pointing anteriorly
	Y	Unit vector going from the elbow joint center to the shoulder joint center (the midpoint between ASH and PSH)
	Z	Unit vector perpendicular to the plane formed by the -axis of the upper arm and the long-axis vector of the forearm.

Note: C7: 7th cervical vertebra; CLAV: clavicular notch; EC: elbow center; EL: lateral epicondyle; EM: medial epicondyle; PSH: posterior shoulder; RS: radial styloid; STRN: sternum; T10: 10th thoracic vertebra; US: ulnar styloid.