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Fig. 11. Changes in the level of salivation upon electrical stimulations of one
salivary duct nerve (SDN). The amount of saliva secreted from a salivary duct
was measured every minute while brief (0.2 ms) electric pulses were delivered
to the SDN at 5 Hz for 2, 5, 10, 20 and 40 s with intervals of 6 min. Averaged
data from 12 preparations are shown as means ± s.e.m. The amounts of
secretion (broken lines) before and after the onset of electrical stimulation
were statistically compared, and asterisks indicate the level of significance
(*P<0.05; **P<0.01;
WCX-test).
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