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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...

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Related Experiment Video

Updated: Aug 12, 2025

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

Intrinsic hippocampal connectivity is associated with individual differences in retrospective duration processing.

Alice Teghil^1,2, Alessia Bonavita^3,4,5, Federica Procida³

¹Department of Psychology, "Sapienza" University of Rome, Via dei Marsi 78, 00185, Rome, Italy. alice.teghil@uniroma1.it.

Brain Structure & Function

|January 25, 2023

Summary

This study reveals that the hippocampus (HC) connectivity patterns correlate with how well people estimate time intervals. Stronger connections between the HC and the precentral gyrus are linked to better retrospective duration processing.

Keywords:

Hippocampus Medial temporal lobe Resting-state fMRI Time perception Timing

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Last Updated: Aug 12, 2025

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

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Published on: August 11, 2019

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Published on: November 14, 2017

Longitudinal Two-Photon Imaging of Dorsal Hippocampal CA1 in Live Mice

Longitudinal Two-Photon Imaging of Dorsal Hippocampal CA1 in Live Mice

Published on: June 19, 2019

Area of Science:

Neuroscience
Cognitive Psychology

Background:

Retrospective duration processing, or estimating past time intervals, is crucial for memory.
The medial temporal lobe and hippocampus (HC) are implicated in encoding event sequences and time.
The precise role of the HC in explicit human duration judgments and its neural dynamics remain unclear.

Purpose of the Study:

To investigate the relationship between intrinsic hippocampal connectivity and individual differences in retrospective duration processing.
To explore the neural underpinnings of estimating time intervals in the second range.

Main Methods:

Resting-state functional magnetic resonance imaging (fMRI) was employed.
A novel task using ecological stimuli assessed retrospective duration discrimination.
Connectivity patterns of the bilateral hippocampus were analyzed in relation to task performance.

Main Results:

Performance in retrospective duration discrimination was associated with intrinsic connectivity variations between the bilateral hippocampus and the right precentral gyrus.
Exploratory analyses indicated that the CA1 and CA4/DG subfields of the hippocampus may drive this association.
These findings highlight neural networks involved in implicit duration processing.

Conclusions:

Intrinsic connectivity of the hippocampus, particularly with the precentral gyrus, plays a role in retrospective duration processing.
Specific hippocampal subfields (CA1, CA4/DG) may be critical for this temporal estimation.
The study provides insights into the neural basis of second-range duration perception.