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Table 3 Description and STAR classification of ataxic features

From: A comprehensive scheme for the objective upper body assessments of subjects with cerebellar ataxia

Test (device) Feature Description STAR
FCT (Kinect©) \(AcAlt^{X,Y(L,R)}_{FCT}\) Acceleration alteration counts the number of times the acceleration is altered Stability
\(ReTi^{X,Y(L,R)}_{FCT}\) Reaction time reflects the cross correlation of the two time sequences representing the marker and the target Timing
\(KiDe^{(L,R)}_{FCT}\) Kinematic delay measures the ratio of the index of difficulty and the movement time Timing
\(DTWEr^{X,Y(L,R)}_{FCT}\) Dynamic time warping based error measures the displacement between the performance marker and the target Accuracy
FTT (IMU) \(CITI^{(L,R)}_{FTT}\) Coefficient of variation of inter-tap interval describes variability with respect to speed Timing
\(FuEn^{AcX(L,R)}_{FTT}\) Fuzzy entropy describes the irregularity of the acceleration on X axis Stability
\(FuEn^{AcZ(L,R)}_{FTT}\) Fuzzy entropy describes the irregularity of the acceleration on Z axis Rhythmicity
\(FuEn^{GyX(L,R)}_{FTT}\) Fuzzy entropy describes the irregularity of the of gyroscopic measurement on X axis Rhythmicity
FNT (IMU) \(RF^{AAcX(L,R)}_{FNT}\) Resonant frequency (RF) at the angular acceleration on X axis Stability
\(RF^{AAcZ(L,R)}_{FNT}\) RF at the angular acceleration on Z axis Stability
\(MR^{AAcX(L,R)}_{FNT}\) Magnitude at resonance (MR) at the angular acceleration on X axis Stability
\(MR^{AAcZ(L,R)}_{FNT}\) MR at the angular acceleration on Z axis Stability
\(RF^{AAcY(L,R)}_{FNT}\) RF at the angular acceleration on Y axis Timing
\(MR^{AAcY(L,R)}_{FNT}\) MR at the angular acceleration on Y axis Rhythmicity
DDKT (IMU) \(RF^{AngX(L,R)}_{DDK}\) RF of the angle on X axis Stability
\(RF^{AngZ(L,R)}_{DDK}\) RF of the angle on Z axis Stability
\(MR^{AngX(L,R)}_{DDK}\) MR at angle on X axis Stability
\(MR^{AngZ(L,R)}_{DDK}\) MR at the angle on Z axis Stability
\(RF^{AcX(L,R)}_{DDK}\) RF at the acceleration on X axis Stability
\(RF^{AcZ(L,R)}_{DDK}\) RF at the acceleration on Z axis Stability
\(MR^{AcX(L,R)}_{DDK}\) MR at the acceleration on X axis Stability
\(MR^{AcZ(L,R)}_{DDK}\) MR at the acceleration on Z axis Stability
\(RF^{AAcY(L,R)}_{DDK}\) RF at the angular accelerations on Y axis Timing
\(MR^{AAcY(L,R)}_{DDK}\) MR at the angular accelerations on Y axis Rhythmicity