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Related Concept Videos

Traumatic Memory01:20

Traumatic Memory

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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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Role of Hippocampus in Memory01:19

Role of Hippocampus in Memory

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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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Dissociative Disorders01:27

Dissociative Disorders

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Dissociative disorders represent complex psychological conditions characterized by disruptions in consciousness, memory, identity, or perception. These disruptions cause individuals to experience a disconnection from their thoughts, emotions, and memories. The phenomenon is not merely an occasional lapse in attention but a profound alteration in mental functioning that can severely impact daily life.
Dissociative Fugue
A hallmark feature of dissociative disorders is the dissociative fugue...
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Post-traumatic Stress Disorder01:27

Post-traumatic Stress Disorder

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Post-traumatic stress disorder (PTSD) is a psychiatric condition that arises following exposure to traumatic events such as natural disasters, forced displacement, or severe accidents. It significantly impairs individuals' ability to cope with daily activities and disrupts their emotional and psychological equilibrium.
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A spectrum of distressing symptoms characterizes PTSD. Recurrent flashbacks, where individuals involuntarily relive traumatic events,...
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Role of Amygdala in Memory01:16

Role of Amygdala in Memory

204
The amygdala is a small, almond-shaped structure responsible for processing and storing memories, particularly those linked to emotions like fear and stress. It plays an essential role in the brain's response to emotionally significant events and often enhances memory formation by triggering stress hormone release. The amygdala is vital for encoding and retrieving memories associated with fear or stress, a process that is adaptive by helping organisms avoid dangerous situations.
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Functional Brain Systems: Limbic System01:15

Functional Brain Systems: Limbic System

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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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Related Experiment Video

Updated: Jun 25, 2025

Investigations on Alterations of Hippocampal Circuit Function Following Mild Traumatic Brain Injury
10:59

Investigations on Alterations of Hippocampal Circuit Function Following Mild Traumatic Brain Injury

Published on: November 19, 2012

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Contextualized hippocampal-cortical dynamics underlying traumatic memory.

Ruth A Lanius1, Breanne E Kearney2

  • 1Department of Neuroscience, Western University, London, ONT, Canada; Department of Psychiatry, Western University, London, ONT, Canada.

Trends in Neurosciences
|May 21, 2024
PubMed
Summary
This summary is machine-generated.

This study links hippocampus activity to brain networks involved in trauma-related intrusive memories. Understanding these neural connections offers insights into memory processing after trauma.

Keywords:
PTSDautobiographical memoryfMRI, default mode networkintrusionsneuroimaging

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Last Updated: Jun 25, 2025

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Investigating Long-term Synaptic Plasticity in Interlamellar Hippocampus CA1 by Electrophysiological Field Recording
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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Psychiatry

Background:

  • Trauma-related intrusive memories (TR-IMs) are a core symptom of PTSD.
  • The neurobiological basis of TR-IMs is complex, involving multiple brain regions.
  • Previous research has implicated the hippocampus (HC) in memory formation and retrieval.

Purpose of the Study:

  • To investigate the relationship between hippocampus activity patterns and functional connectivity networks.
  • To explore the neurobiological underpinnings of distinct characteristics of TR-IMs.
  • To situate the hippocampus within a broader neural framework for understanding TR-IMs.

Main Methods:

  • Utilized a neurophenomenological methodology.
  • Analyzed activity patterns of the hippocampus (HC).
  • Examined functional connectivity networks associated with TR-IMs.

Main Results:

  • Established a connection between HC activity patterns and broader functional connectivity networks.
  • Demonstrated the HC's role within a larger neural framework for TR-IMs.
  • Provided nuanced insights into the neurobiology of TR-IM characteristics.

Conclusions:

  • The hippocampus plays a crucial role in the neural circuitry of trauma-related intrusive memories.
  • Functional connectivity analysis reveals the interconnectedness of brain regions involved in TR-IMs.
  • This research advances our understanding of the neural mechanisms underlying traumatic memory.