Table 3.

Effects of excitotoxic (ibotenic acid) lesion of the SVA on the effects of electrical stimulation of MCVA, hypoxemic hypoxia, and hypercarbia

	Δ rCBF (%)	Δ CVR (%)	PO2	PCO2	pH
MCVA stimulation
SVA lesion
Before	31  ± 7	−25  ± 6	95  ± 2	34  ± 2	7.46  ± 0.02
After	5  ± 4	−1  ± 2	102  ± 3	38  ± 1	7.43  ± 0.02
Control lesion
Before	28  ± 5	−22  ± 7	98  ± 2	37  ± 1	7.44  ± 0.03
After	26  ± 7	−21  ± 3	96  ± 4	31  ± 2	7.46  ± 0.02
Hypoxia
SVA lesion
Before	91  ± 16	−45  ± 10	94  ± 3	34  ± 2	7.45  ± 0.03
After	44  ± 16	−29  ± 9	27  ± 7	36  ± 1	7.44  ± 0.02
Control lesion
Before	109  ± 19	−49  ± 12	95  ± 2	31  ± 1	7.46  ± 0.02
After	98  ± 26	−47  ± 11	26  ± 8	36  ± 2	7.44  ± 0.03
Hypercarbia
SVA lesion
Before	103  ± 19	−49  ± 15	89  ± 4	37  ± 2	7.44  ± 0.02
After	73  ± 15	−45  ± 12	94  ± 3	56  ± 8	7.34  ± 0.04
Control lesion
Before	134  ± 21	−58  ± 13	92  ± 2	34  ± 3	7.45  ± 0.03
After	87  ± 19	−47  ± 16	97  ± 3	54  ± 7	7.36  ± 0.04