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Role of Hippocampus in Memory

Role of Hippocampus in Memory

The hippocampus, a critical brain structure, plays an essential role in memory processing, particularly in the formation and retrieval of memory. This small, seahorse-shaped region is located within the medial temporal lobe, with one hippocampus in each brain hemisphere. Experimental studies involving lesions in the hippocampi of rats have demonstrated significant impairments in tasks such as object recognition and maze navigation, indicating the hippocampus involvement in both recognition and...

Working Memory

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Working memory refers to a combination of components, including short-term memory and attention, that allow an individual to hold information temporarily as we perform cognitive tasks. It is an essential cognitive function that enables the execution of complex tasks such as problem-solving, comprehension, and reasoning. Unlike short-term memory, which simply involves the storage of information for a brief period, working memory involves the active manipulation and processing of this...

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Related Experiment Video

Updated: Sep 8, 2025

The Double-H Maze: A Robust Behavioral Test for Learning and Memory in Rodents

The Double-H Maze: A Robust Behavioral Test for Learning and Memory in Rodents

Published on: July 8, 2015

Does working memory activate the hippocampus during the late delay period?

Scott D Slotnick¹

¹Department of Psychology and Neuroscience, Boston College Boston, MA, USA.

Cognitive Neuroscience

|June 14, 2022

Summary

This study found no convincing evidence that the hippocampus is involved in working memory maintenance. Findings suggest working memory may foster long-term memory encoding for novel information.

Keywords:

MTL Working memory fMRI hippocampus long-term memory review short-term memory

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Related Experiment Videos

Last Updated: Sep 8, 2025

The Double-H Maze: A Robust Behavioral Test for Learning and Memory in Rodents

The Double-H Maze: A Robust Behavioral Test for Learning and Memory in Rodents

Published on: July 8, 2015

Hippocampal Insulin Microinjection and In vivo Microdialysis During Spatial Memory Testing

Hippocampal Insulin Microinjection and In vivo Microdialysis During Spatial Memory Testing

Published on: January 11, 2013

Investigating Long-term Synaptic Plasticity in Interlamellar Hippocampus CA1 by Electrophysiological Field Recording

Investigating Long-term Synaptic Plasticity in Interlamellar Hippocampus CA1 by Electrophysiological Field Recording

Published on: August 11, 2019

Area of Science:

Neuroscience
Cognitive Psychology

Background:

The hippocampus plays a critical role in memory formation.
Its precise involvement in working memory, particularly during different phases, remains debated.

Purpose of the Study:

To systematically review functional magnetic resonance imaging (fMRI) studies to determine if the hippocampus is associated with working memory.
To investigate hippocampal activity across distinct phases of working memory tasks: study, early delay, late delay, and test.

Main Methods:

A systematic analysis of 26 working memory studies reporting hippocampal activity.
Consideration of various parameters including task design, stimulus type, information novelty, and fMRI analysis methods.
Examination of hippocampal activation during different task phases, distinguishing between early and late delay periods.

Main Results:

Familiar information elicited hippocampal activity during study and/or test phases, but not during delay periods.
Novel information showed activity during the early delay phase when distinguishable.
No convincing evidence of hippocampal activation was found during the late delay period of working memory tasks.

Conclusions:

Working memory, specifically the maintenance of information, does not appear to significantly activate the hippocampus.
A revised model of working memory is proposed, suggesting that maintenance of novel information may facilitate long-term memory encoding.