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Table 4

Z Joint Gapping and Cavitation Data.

Subject # and
Z Joint (Jt)
Levels
NeutralSide-postureGapping Difference (GD)Cavitation
Up-Side
Notes on Cavitation (Cav): Up-
Side Left (L) or Right (R),
Vertebral Level

Upside
L/R
Downside
L/R
Upside
L/R
Downside
L/R
UpsideDownsideYes (Y)/
No(N)

Subject 1LRLR2 Cavs from L1/L2 with SMT, L Side-up
L4/L53.44.23.83.10.4−1.1N
L5/S13.33.43.33.30−0.1N

Subject 2LRLRL5/S1 with SMT – very low amplitude, L side-up
L4/L53.84.54.33.80.5−0.7N
L5/S15.13.95.540.40.1Y

Subject 3RLRLSeveral Cavs heard during L side-up positioning before recording began
L4/L5andL5/Sl during positioning with R side-up, none during SMT
L4/L54.43.36.33.81.90.5Y
L5/S14.33.54.72.30.4−1.2Y

Subject 4LRLRL1/L2 and L2/L3 with SMT, L side-up
L4/L53.5J.J4.83.81.30.5N
L5/S13.53.43.83.4.0.30N

Subject 5RLRLNone L side-up
L4/L5 during positioning, R side-up; Sacroiliac Joint during SMT, R side-up
L4/L53.63.84.14.20.50.4Y
L5/S13.74.13.43.8−0.3−0.3N

Average GD
Upside and
Downside
(STD)
0.5 (±0.6)−0.2 (±0.6)

Average
Cav Z Jts
(STD)
0.8 (±0.7)

Average
NO Cav Z Jts
(STD)
0.4 (±0.5)
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