How does the hippocampus help bind items and contexts into a memory?

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Patient H.M. and short-term memory loss explained — hippocampus Learn about Henry Molaison (better known as “patient H.M.”), whose short-term memory loss following a lobotomy helped researchers to understand how brain structures are related to brain function.

The hippocampus is widely recognized for its role in memory, though the precise mechanisms by which it binds items and contexts into unified experiences remain a subject of scientific debate.1

Current theories regarding this process include:

Binding and Storage: Some researchers propose that the hippocampus actively binds various items and their associated contexts into a single, unified experience, which is then stored within the structure.1
Indexing: Other theories suggest the hippocampus functions as an index—similar to the index of a book—that links together the disparate elements of an experience. In this model, the hippocampus does not store the experience itself; rather, it maintains an index of a code that is distributed throughout the rest of the brain.1
Reducing Interference: Another perspective posits that the hippocampus facilitates rapid learning by minimizing interference between similar memories, such as distinguishing between events that occurred at different times.1

These processes are essential for forming declarative memories, and dysfunction in this region often leads to significant deficits in creating new memories for facts and events.1