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. Author manuscript; available in PMC: 2011 May 1.
Published in final edited form as: Biol Psychiatry. 2009 Dec 24;67(9):880–886. doi: 10.1016/j.biopsych.2009.10.030

Figure 4.

Figure 4

Ghrelin-induced acquisition of food CPP activates orexin neurons in the lateral hypothalamus. Representative photomicrographs of brains processed by dual-label immunohistochemistry for orexin (red) and c-fos (brown) (A) and quantification of dual-labeled neurons (B) demonstrating that mice that exhibited ghrelin-induced preference for the HFD-paired chamber show increased c-fos induction within LHA orexin cells. Dual-labeled neurons are identified by arrows. Data represent the mean ± s.e.m. ** p<0.01.