The
dentate gyrus is part of the
hippocampus and/or
hippocampal formation, as some texts include the latter structure in the former or vice versa. The dentate gyrus is thought to contribute to the formation of new episodic
memories, the spontaneous exploration of novel environments, and other functions. It is notable as being one of a select few
brain structures currently known to have high rates of
neurogenesis in adult rats (other sites include the
olfactory bulb and
cerebellum).