Figure 4. Expression of syntaxin 1B in HVC is higher in dominant females than in dominant males, but similar to subordinate males.

Darkfield photomicrographs showing the expression of syntaxin 1B (STX1B) in song nucleus HVC of a dominant male (A), a dominant female (B) and a subordinate male (C). Arrows indicate the ventral border of HVC. Dorsal is to the top and caudal is to the right in these parasagittal sections, (scale bar = 300 µm).