Fig. 8.

Comparison of the 1-μV threshold for the difference and sum curves for KA treatment and control animals. For control animals, lactated Ringer solution alone was placed at the RW, and there was little change in threshold in either the difference or sum curve across frequencies. With the KA treatment there was some overall loss of response at most frequencies, which was in general not significantly different from controls except at low frequencies. Error bars are SE. Level of significance in 2-tailed t-tests: *P < 0.05; **P < 0.01; ***P < 0.001.