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. 2015 Jun 24;10(6):e0118496. doi: 10.1371/journal.pone.0118496

Fig 3. PVALB mRNA expression in the core and shell regions of the MO and NAO song nuclei in the budgerigar brain.

Fig 3

(a) High power view of darkfield (i-ii) and brightfield (cresyl violet stained) (iii) images showing expression of parvalbumin mRNA in MO. (b) High power view of darkfield (i-ii) and brightfield (cresyl violet stained) (iii) images showing expression of parvalbumin mRNA in NAO. (c) Serial sections of a budgerigar brain (i-xv) showing the core and shell regions of MO and NAO song nuclei. Silver grains is white; cresyl violet is red-brown. Sections are in the coronal plane; medial is to the left, dorsal is top. See list for abbreviations.