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Brain regions quantified for Fos immunoreactivity in the zebra finch brain. Drawing of three transverse brain sections (1–3) and their locations along the sagittal plane (top diagram) depicting all regions quantified bilaterally for Fos immunoreactivity in this study. Black squares on the left hemisphere represent sampling squares taken at 40× objective magnification and brain region acronyms are located in the relative position of the sampling square in the right hemisphere.
