Table 2.

Reliability analysis (intraclass correlation coefficient–ICC) results for CROMs and mean angular velocities relative to the inertial sensor placed on second cervical vertebra (C2), on the forehead (F), and on the external occipital protuberance (EOP).

	C2	F	EOP
CROM
Right Rotation [°]	0.86	0.92	0.92
Left Rotation [°]	0.85	0.86	0.86
Flexion [°]	0.98	0.75	0.98
Extension [°]	0.94	0.95	0.92
Right Lateral Bending [°]	0.92	0.88	0.94
Left Lateral Bending [°]	0.91	0.84	0.93
Mean angular velocities
Right Rotation [°/s]	0.77	0.6	0.91
Left Rotation [°/s]	0.72	0.44	0.77
Flexion [°/s]	0.93	0.95	0.92
Extension [°/s]	0.83	0.84	0.66
Right Lateral Bending [°/s]	0.34	0.28	0.62
Left Lateral Bending [°/s]	0.28	0.28	0.63