Table 5. Significantly different channels and corresponding brain regions presented in cross-sectional statistical topography of [oxy-Hb].

1. Tooth Loss vs. Rest
	Pre-chewing	Chewing	Post-chewing
DLPFC	ns	ns	ch. 10, 13
FPA	ns	ns	ch. 10, 11, 13, 15
BA	ns	ch. 5	ch. 5
OFC	ns	ns	ch. 15
IPG	ns	ns	ns
2. Wearing Denture vs. Rest
	Pre-chewing	Chewing	Post-chewing
DLPFC	ch. 1, 2, 4, 6, 7, 8, 10	ch. 1, 2, 3, 4, 6, 7, 8, 10, 13,19	ch. 1, 2, 6, 7, 10, 13, 19
FPA	ch. 6, 7, 8, 10, 11	ch. 6, 7, 8, 10, 11, 12, 13, 15, 17, 19	ch. 6, 7, 10, 11, 15, 19
BA	ns	ch. 5, 9	ch. 5, 9
OFC	ns	ch. 15, 17, 19	ch. 15, 19
IPG	ns	ch. 19	ch. 19
3. Young vs. Rest
	Pre-chewing	Chewing	Post-chewing
DLPFC	ch. 6, 10, 13, 19	ch. 1, 2, 3, 4, 6, 7, 8, 10, 13, 19	ch. 1, 2, 6, 10, 13, 19
FPA	ch. 6, 10, 11, 12, 13, 15, 16, 17, 19	ch. 6, 7, 8, 10, 11, 12, 13, 15, 16, 17, 19, 22	ch. 6, 10, 11, 13, 16, 19, 22
BA	ch. 5	ch. 5, 9	ch. 5, 9
OFC	ch.15, 17, 20, 21	ch. 15, 17, 19, 20, 21, 22	ch. 19, 22
IPG	ns	ch. 19, 22	ch. 19, 22

The channels shown presented significantly (paired t-test, p<0.05) increased values for [oxy-Hb] between Tooth Loss and Rest, Wearing Denture and Rest, and Young and Rest. Chewing under Tooth Loss activated only 1 channel in the prefrontal cortex, while Wearing Denture and Young showed numerous markedly activated channels in the prefrontal cortex as compared with the Rest condition.