O. Representative images of GABAergic neurons and total number of GABAergic neurons (GFP+ cells) in the optic tectum (OT) and cerebellum (CB) regions of wild-type, chd7 mutant and ephedrine-treated fish (n=9; ****p<0.0001; One-way ANOVA). Treatment with ephedrine ameliorated the number of GABAergic neurons. 