Remembering the Past and Imagining the Future Depend on a Common Network of Brain Regions A common brain network is activated when people remember episodes that actually occurred in their personal pasts and when they imagine episodes that might occur in their personal futures. This network includes the hippocampus, a part of the medial temporal lobe long known to play an important role in episodic memory (Schacter, Addis, & Buckner, 2008).