Normative Data for an Instrumental Assessment of the Upper-Limb Functionality

Table 1

Metrics.

Measure	Task quantities		Description
	RM	HtMM
Time			Movement duration
Position			Elbow angle at end movement EA > 0 flexion EA = 0 fully extended EA < 0 hyperextension
			Angle of arm flexion at end of movement AAF > 0 flexion      AAF = 0 rest position      AAF < 0 extension
Velocity			Mean elbow angular velocity
			Mean target approaching velocity normalize on UL length
Repeatability			Coefficient of periodicity calculated on WTD acceleration
Smoothness			Normalized jerk calculated on WTD; WTD: Wrist Target Distance (see Figure 1(b) and Figure 1(c))