Fig. 2.

Correlations between nest-building behaviors and Fos immunoreactivity in the anterior motor pathway in zebra finches. Lines represent significant correlations between the picking up of nesting material and the number of Fos immunoreactive nuclei quantified in regions within the anterior motor pathway (p < 0.05) in adult male zebra finches. Correlations were derived from stepwise linear regressions. Within each graph, the regression coefficient and p value of the model are presented in the top left corner. Micrographs of sampling squares taken in tissue stained to label neurons producing Fos in ASt in the right hemisphere of a male finch who picked up the most and a male finch who picked up the least amount of material while constructing a nest (bottom right). Scale bar represents 50 μm. ASt = anterior striatum; AN = anterior nidopallium; AMV = anterior ventral mesopallium.