Hippocampal Ghrelin-positive neurons directly project to arcuate hypothalamic and medial amygdaloid nuclei. Could they modulate food-intake?
Russo C, Russo A, Pellitteri R, Stanzani S.
Neurosci Lett. 2017 May 25;653:126-131.

Effects of different musical frequencies on NPY and Ghrelin secretion in the rat hypothalamus.
Russo C, Russo A, Gulino R., Pellitteri R, Stanzani S.
Brain Research Bullettin 2017 June, in press.