Figure 2. Fitting of dark-adapted ERG a-waves. A: Representative a-wave fitting waveforms of midazolam, medetomidine, and butorphanol tartrate (MMB), pentobarbital sodium, and ketamine/xylazine (KX). The log sensitivity (S), log maximum amplitude (R_max), and delay before the onset of the a-wave (T_d) parameters of each group are shown in B, C, and D, respectively. D: Note that the T_d of the mice administered MMB and pentobarbital sodium was larger than that of the mice administered KX. Statistically significant differences are indicated by ** for p<0.01 using one-way factorial ANOVA (ANOVA) followed by Tukey’s test.