Table 2.

Summary of incremental changes in CMR_O2 and ν relative to baseline I

	CMRO2	ν
Baseline I	1.00  ± 0.19	1.00  ± 0.25
Stimulation I	1.40  ± 0.46	1.29  ± 0.58
Baseline II	0.68  ± 0.17	0.71  ± 0.27
Stimulation II	1.38  ± 0.30	1.44  ± 0.44

The stimulation induced similar averaged increases in CMR_O2 (relative) and ν (relative) for conditions I (≈40% and ≈30%, respectively) and II (≈100% and ≈100%, respectively), where the larger incremental change from condition II (in comparison to condition I) was observed because of the lowered starting baseline value (by ≈30%). Because absolute values of CMR_O2 were not measured directly by the calibrated BOLD method (8), the changes in CMR_O2 (as shown here) reflect relative changes when the values obtained in the baseline period of condition I is used for normalization. Although absolute values of ν were measured in all conditions, the changes in ν (as shown here) are normalized to the baseline period of condition I.

^*The final CMR_O2 values were insignificantly different (P > 0.36) on stimulation from baseline conditions I and II (see Fig. 2).

^† The final ν values were insignificantly different (P > 0.25) on stimulation from baseline conditions I and II (see Fig. 2).