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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...

Higher Mental Functions of Brain: Learning and Memory

Higher Mental Functions of Brain: Learning and Memory

Memory is one of the most vital higher mental functions of the brain. Memory is closely related to learning because it enables us to retain information and experiences from our past to use them in our present life. It also helps us to remember facts, events, and skills, such as riding a bike or swimming. There are two types of memory — declarative memory, which involves memorizing facts or events, and procedural memory, which enables us to remember how to do something like writing or...

Traumatic Memory

Traumatic Memory

Emotionally traumatic events often lead to memories that are exceptionally vivid and enduring, sometimes persisting with remarkable clarity throughout an individual's life. A classic example of this phenomenon is a person who survives a car accident. Even years later, they may recall every detail of the event with startling accuracy — the screeching of the tires, the jarring impact, and the acrid smell of burning rubber. Such vividness contrasts sharply with how an individual...

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The limbic system, often called the "emotional brain," is a complex set of structures located deep within the brain. The intricate network of the limbic system supports a wide range of psychological functions, from emotional regulation to memory formation and sensory processing. This functional brain region encompasses specific parts of the diencephalon and the cerebrum, integrating the higher mental functions of the cerebral cortex with the primitive emotional responses of the deep brain...

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Long-term memory is a relatively permanent type of memory, capable of storing vast amounts of information over extended periods. Its storage capacity is generally considered unlimited.
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Related Experiment Video

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Author Spotlight: Investigating Neural Activity of Dentate Gyrus Granule Cells with Miniature Microscope

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Published on: August 2, 2024

Hippocampal Engrams and Contextual Memory.

Krithika Vasudevan¹, James E Hassell¹, Stephen Maren²

¹Department of Psychological and Brain Sciences and Institute for Neuroscience, Texas A&M University, College Station, TX, USA.

Advances in Neurobiology

|July 15, 2024

Summary

The hippocampus is crucial for contextual fear memory in rodents. New methods reveal how specific brain cell groups (engrams) in the hippocampus encode and retrieve these fear memories.

Keywords:

Aversive memories Contextual learning DREADDs Hippocampus

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Last Updated: Jun 21, 2025

Author Spotlight: Investigating Neural Activity of Dentate Gyrus Granule Cells with Miniature Microscope

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Published on: August 2, 2024

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

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Assessment of Memory Function in Pilocarpine-induced Epileptic Mice

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Published on: June 4, 2020

Area of Science:

Neuroscience
Memory Research
Behavioral Neuroscience

Background:

Contextual stimuli are vital for memory encoding and retrieval.
Traumatic events become associated with specific contexts, eliciting fear responses.
The hippocampus plays a key role in contextual learning and fear conditioning.

Purpose of the Study:

To review the hippocampus's role in rodent contextual fear conditioning.
To explore neuronal mechanisms of encoding and retrieving contextual fear memories.
To highlight advancements in understanding memory engrams.

Main Methods:

Review of existing literature on hippocampal function in fear conditioning.
Discussion of activity-dependent neuronal labeling techniques.
Exploration of methods for selective manipulation of memory ensembles.

Main Results:

Hippocampal ensembles are implicated in encoding and retrieving aversive memories.
Neuronal labeling methods offer insights into memory substrates.
Selective manipulation of memory ensembles is feasible.

Conclusions:

Understanding hippocampal mechanisms is key to addressing trauma-related disorders.
Targeting fear memory engrams may offer therapeutic benefits.
Further research on hippocampal ensembles can advance memory science.