Table 4.
Calculated Responses
| ROI | %CMRO2a | Mb | nc | nCO2d |
|---|---|---|---|---|
| V1 | 30.9 ± 7.5** | 0.112 ± 0.042** | 2.45 ± 0.42** | 3.52 ± 0.99 |
| PICORE – BOLD (c.c = 0.5) | 22.3 ± 6.8 | 0.092 ± 0.03** | 3.18 ± 0.89 | 3.79 ± 1.21 |
| PICORE – CBF (c.c. = 0.4) | 23.9 ± 7.8 | 0.072 ± 0.01 | 3.01 ± 0.59* | 3.51 ± 0.87 |
| PICORE – CBF (c.c = 0.5) | 22.5 ± 7.9 | 0.067 ± 0.019 | 3.45 ± 0.94 | 3.61 ± 1.00 |
| PICORE – CBF (c.c. = 0.6) | 18.4 ± 9.9* | 0.065 ± 0.024 | 4.37 ± 2.14* | 3.57 ± 1.17 |
| QUIPSS II – CBF (c.c = 0.5) | 26.7 ± 9.0 | 0.064 ± 0.01 | 3.16 ± 0.81 | 3.74 ± 1.18 |
a
Fractional change in CMRO2 with activation computed as the average (±SD) of individual subject CMRO2 changes
b
BOLD calibration factor estimated from the hypercapnia experiment. Reported as the average (±SD) of individual subject M calculations.
c
index of CBF/CMRO2 coupling, the ratio of %CBF to %CMRO2. Reported as the inverse of the average individual subject 1/n values.
d
index of CBF/CO2 coupling, the ratio of %CBF to the fractional change in end-tidal
*
significant difference with the PICORE-CBF (r=0.5) data with p<0.05
**
significant difference with the PICORE-CBF (r=0.5) data with p<0.01