Fig. 2From: Evaluation of postural stability based on a force plate and inertial sensor during static balance measurementsInertial sensor. a Inertial sensor location. After pressing the calibration button, the sensor will move left and right as x (right+, left-), up and down as y (up+, down-), or forward and back as z (forward+, back-). b Wireless tri-axial accelerometer system (Freescale RD3152MMA7260Q)Back to article page