What is the primary function of the mammillary bodies?

The mammillary bodies play a significant role in the limbic system, particularly in the processing and consolidation of memory. They are involved in the recollection of memories and are closely linked to the formation of new memories, especially in relation to episodic memory—the memories of personal experiences and specific events. The mammillary bodies receive input from the hippocampus, which is crucial for forming memories, and they relay this information to other parts of the brain, especially the thalamus. This relay of signals is a key element of memory processes, supporting why the primary function of the mammillary bodies is best described as relaying signals involved in memory.