Table 6 Comparison between healthy controls and MS subjects with subtle arm impairment – ARAT task sub-movements

Reaching

Phase Duration [s]

0.45 (0.39-0.62)

0.46 (0.41-0.53)

0.814

Phase Jerk Index [ ]

1.83 (1.66-2.05)

1.83 (1.63-1.96)

0.742

Manipulation

Phase Duration [s]

0.14 (0.05-0.21)

0.30 (0.28-0.37)

0.002

Phase Jerk Index [ ]

1.01 (0.25-1.54)

1.77 (1.22-1.92)

0.003

Transport

Phase Duration [s]

0.66 (0.56-0.80)

0.77 (0.70-0.90)

0.020

Phase Jerk Index [ ]

1.93 (1.69-2.37)

1.96 (1.77-2.02)

0.687

Release

Phase Duration [s]

0.21 (0.10-0.32)

0.28 (0.22-0.32)

0.028

Phase Jerk Index [ ]

1.52 (0.71-2.01)

1.77 (1.26-2.20)

0.209

Return

Phase Duration [s]

0.67 (0.56-0.70)

0.68 (0.62-0.82)

0.476

Phase Jerk Index [ ]

2.00 (1.80-2.33)

1.97 (7.76-2.23)

0.541