
Keywords: 5HT; serotonergic; ANOVA; analysis of variance; BS; blocking solution; cFos-ir; cFos immunoreactivity; Ch; cholinergic; ChAT; Choline Acetyltransferase; cPBS; chicken embryology PBS; DR; Dorsal Raphe (nucleus); E; embryonic day; EDTA; ethylenediaminetetra