Table 2.

Average range of motion in flexion-extension (FE), lateral bending (LB), and axial rotation (AR) for the second instrumented level (T11–T12) for all constructs. All data are normalized to intact (100%). *P ≤ .05 versus intact; †P ≤ .05 versus rigid; ‡P ≤ .05 versus SPT 2.

Construct	FE (Mean ± SD)	LB (Mean ± SD)	AR (Mean ± SD)
Rigid	15 ± 9*	20 ± 10*	62 ± 26*
SPT 1	26 ± 15	50 ± 21	59 ± 21
SPT Helix 1	33 ± 24	48 ± 15	48 ± 18
SPT Trans-Helix 1	28 ± 12	52 ± 19	49 ± 19
SPT 2	57 ± 19*†	95 ± 24†	66 ± 23*
SPT Helix 2	101 ± 21†‡	104 ± 21†	72 ± 24
SPT Trans-Helix 2	91 ± 20†‡	103 ± 18†	74 ± 23