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Table 1 Acceleration, jerk, and velocity based motor pattern parameter results for referential motion capture (Optotrak) and IMU data

From: Infant trunk posture and arm movement assessment using pressure mattress, inertial and magnetic measurement units (IMUs)

  Optotrak Forearm IMU
Root mean square acceleration [m/s2] 0.77 0.89
Root mean square jerk [m/s3] 12.08 10.48
Normalized mean absolute jerk [m/s3] 7.98 6.86
Pearson R acceleration 0.79
Pearson R jerk 0.76
Pearson R hand velocity forearm IMU 0.93
Pearson R hand velocity 2 IMUs per arm 0.95