Table 1.

Average percent changes and standard errors of the SEP and hemoglobin concentration areas (top) and peak amplitudes (bottom) with respect to pre-infusion cycles. Positive changes indicate increase, negative decrease of the responses with respect to the pre-infusion cycles. Statistically significant changes are indicated in bold. Superscript numbers are the corresponding p-values.

	infusion side					control side
	ΣP1	ΣN1	ΣP2	ΣHbO	ΣHbR	ΣP1	ΣN1	ΣP2	ΣHbO	ΣHbR
aCSF	7±5.23	−9±4.08	−16±5.03	−20±11.11	−22±10.06	−6±5.27	−3±3.41	−8±3.11	−8±11.55	−4±10.74
GABA	−7±9.46	−50±7.000	−59±7.001	−66±13.002	−65±12.002	−27±8.03	−22±9.07	−21±12.16	−14±11.25	−17±9.12

	infusion side					control side
	P1	N1	P2	HbO	HbR	P1	N1	P2	HbO	HbR
aCSF	−1±3.53	−7±4.07	−7±5.13	−12±8.14	−18±7.03	−4±4.25	−2±2.23	−5±4.16	−4±8.43	−1±7.61
GABA	−28±6.001	−41±6.000	−41±6.000	−37±6.000	−41±7.000	−21±6.007	−16±8.06	−13±8.12	−5±7.37	−11±5.06