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Figure 4

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Location and taping of accelerometers, spinal manipulation while recording from accelerometers, and 2nd (side-posture position) MRI scan. Once the correct location of the SPs were verified from the MRI scans showing the high signal markers, accelerometers were taped over the SPs of T12, L3, and S1. A: Illustration showing placement of 3 accelerometers. B: Taping the 3 accelerometers on the SPs. C: Close-up of an accelerometer (approximately 1 cm3). D: Spinal manipulation given while recording from the 3 accelerometers. E: Second MRI scan, this time in the side-posture position to maximize Z joint gapping following SMT (accelerometers removed following SMT).