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Related Concept Videos

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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Traumatic Memory01:20

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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 Neurotransmitters in Memory01:23

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Neurotransmitters are integral to the brain's communication system, enabling neurons to transmit signals across synapses. This chemical exchange underpins various cognitive functions, including memory processes. The role of neurotransmitters in memory is multifaceted, influencing the encoding, consolidation, and retrieval of memories through their action on different neural circuits.
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Role of Amygdala in Memory01:16

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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

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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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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...
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Related Experiment Video

Updated: Apr 30, 2026

Using Practice Testing, Public Speaking, and Source Monitoring to Examine the Influences of Learning Strategies and Stress on Episodic Memory
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Stress, memory, and the hippocampus.

Katja Wingenfeld1, Oliver T Wolf

  • 1Department of Psychiatry, Charité University Berlin, Campus Benjamin Franklin, Berlin, Germany.

Frontiers of Neurology and Neuroscience
|April 30, 2014
PubMed
Summary

Stress hormones like cortisol impact memory. While enhancing consolidation, they impair retrieval in healthy individuals, but this effect is altered in mental disorders such as depression, PTSD, and BPD.

Area of Science:

  • Neuroscience
  • Psychology
  • Endocrinology

Background:

  • Stress hormones, such as cortisol, significantly influence cognitive functions, particularly hippocampus-dependent declarative memory.
  • Glucocorticoid receptor sensitivity and hippocampal integrity are crucial in mediating these effects.
  • The hypothalamus-pituitary-adrenal (HPA) axis is a primary regulator of the stress response, closely interacting with the hippocampus and memory systems.

Purpose of the Study:

  • To review and integrate findings on the relationship between the HPA axis, hippocampus, and memory.
  • To compare the effects of stress hormones on memory in healthy individuals versus those with major depressive disorder (MDD), posttraumatic stress disorder (PTSD), and borderline personality disorder (BPD).

Main Methods:

  • Literature review integrating studies on HPA axis function, hippocampal integrity, and memory performance.

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  • Comparative analysis of findings in healthy participants and patients with selected mental disorders.

    • Main Results:

    • In healthy individuals, cortisol enhances memory consolidation but impairs retrieval.
    • In major depressive disorder (MDD), cortisol administration does not affect memory retrieval.
    • In contrast, patients with PTSD and BPD exhibit enhanced memory retrieval following hydrocortisone administration, suggesting altered sensitivity to stress hormones.

    Conclusions:

    • The acute effects of stress hormones on memory differ significantly between healthy individuals and those with psychiatric disorders.
    • Altered HPA axis function and hippocampal dysfunctions in MDD, PTSD, and BPD lead to distinct responses to stress hormones regarding memory.
    • These findings highlight the complex interplay between stress, the HPA axis, hippocampal function, and memory in mental health conditions.