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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...

Lateralization

Lateralization

Brain lateralization refers to the division of mental processes and functions between the two hemispheres of the brain, a phenomenon that optimizes neural efficiency and underpins complex abilities in humans. This specialization allows each hemisphere to perform tasks where it has a comparative advantage, facilitating more refined cognitive capabilities across different domains.

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Related Experiment Video

Updated: Jun 10, 2026

Assessing Human Spatial Navigation in a Virtual Space and its Sensitivity to Exercise

Assessing Human Spatial Navigation in a Virtual Space and its Sensitivity to Exercise

Published on: January 26, 2024

Lateralized human hippocampal activity predicts navigation based on sequence or place memory.

Kinga Iglói¹, Christian F Doeller, Alain Berthoz

¹Laboratoire de Physiologie de la Perception et de l'Action Collège de France, F-75005 Paris, France.

Proceedings of the National Academy of Sciences of the United States of America

|July 28, 2010

Summary

This summary is machine-generated.

The human hippocampus uses distinct right and left sides for spatial navigation and memory. Right hippocampal activity supports place-based (allocentric) representations, while the left supports sequence-based (egocentric) ones.

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Modeling the Functional Network for Spatial Navigation in the Human Brain

Modeling the Functional Network for Spatial Navigation in the Human Brain

Published on: October 13, 2023

Area of Science:

Neuroscience
Cognitive Psychology
Neuroimaging

Background:

The hippocampus is vital for spatial navigation and episodic memory.
A common function for these roles has been hypothesized but not fully elucidated.

Purpose of the Study:

To investigate the distinct roles of the left and right hippocampi in spatial representation and navigation.
To determine if hippocampal activity predicts behavioral strategies before choice points.

Main Methods:

Adapted a rodent spatial navigation paradigm for human functional MRI (fMRI) studies.
Analyzed fMRI data to correlate hippocampal activation with spatial representation strategies.

Main Results:

Right hippocampus activation predicted allocentric (environment-centered) spatial representations.
Left hippocampus activation predicted egocentric (self-centered, sequential) spatial representations.
These representations were detectable in hippocampal activity prior to behavioral manifestation.

Conclusions:

The hippocampi do not share a single common function but provide complementary spatial representations.
The right hippocampus is associated with place-based navigation, and the left with sequential navigation.
These distinct hippocampal functions likely contribute to different facets of episodic memory formation and retrieval.