A hormone that’s been tied to hunger may also play a pivotal role in creating and retrieving memories, according to a study in mice. These findings could spur new strategies for improving learning and memory in people.
When the stomach is empty, its lining cells secrete a hormone called ghrelin. Previous studies have shown that ghrelin migrates through the bloodstream and into the brain, where it stimulates receptors on nerve cells in the hypothalamus.
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