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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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A schema is a mental framework that helps individuals organize and interpret information. Schemata, formed from previous experiences, influence how we process new information: how we encode it, the inferences we make, and how we retrieve it. For instance, a schema for what a typical classroom looks like might include desks, a teacher's desk, a whiteboard, and students in such an environment. This expectation helps us quickly understand and navigate new classrooms without needing to analyze...
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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

Updated: Dec 18, 2025

Investigating Long-term Synaptic Plasticity in Interlamellar Hippocampus CA1 by Electrophysiological Field Recording
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Sequence Memory in the Hippocampal-Entorhinal Region.

Jacob L S Bellmund1, Ignacio Polti2, Christian F Doeller1,2

  • 1Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Germany.

Journal of Cognitive Neuroscience
|June 13, 2020
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Summary
This summary is machine-generated.

The hippocampus and entorhinal cortex are crucial for remembering event sequences, a key part of episodic memory. These brain regions process temporal relationships, enabling recall and flexible mental simulations of event order.

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Area of Science:

  • Neuroscience
  • Cognitive Psychology

Background:

  • Episodic memories are built from event sequences.
  • Recalling memories involves retrieving event order, not just individual events.
  • Relational networks in the hippocampal-entorhinal region are hypothesized to store sequence information.

Purpose of the Study:

  • To investigate the role of the hippocampal-entorhinal region in processing and remembering event sequences.
  • To integrate recent findings on the entorhinal cortex's contribution to sequence memory.
  • To explore the concept of temporal scaling in sequence representations.

Main Methods:

  • Review of existing evidence on hippocampal function in temporal relations.
  • Incorporation of novel insights from recent studies on entorhinal cortex in sequence memory.
  • Discussion of theoretical implications for temporal scaling in memory.

Main Results:

  • Temporal relations are a fundamental organizational principle in the hippocampus.
  • The lateral entorhinal subregion in rodents processes temporal information during behavior.
  • The human entorhinal cortex is involved in memory recall, reflecting event sequence relationships.

Conclusions:

  • The entorhinal cortex and hippocampus are essential for remembering event sequences.
  • These regions support the temporal organization of episodic memories.
  • The hippocampal-entorhinal region may enable flexible temporal scaling of memory recall and mental simulation.