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. Author manuscript; available in PMC: 2016 Apr 1.
Published in final edited form as: Front Neuroendocrinol. 2014 Oct 5;37:119–128. doi: 10.1016/j.yfrne.2014.09.003

Figure 5.

Figure 5

A summary of the main interactions between photoperiod, hormones, neurotrophins, brain, and behavior that characterize seasonal plasticity of the song system. See text for explanation. (Figure prepared by T. Larson.)