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Related Concept Videos

Autobiographical Memory01:14

Autobiographical Memory

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Autobiographical memory is a unique type of episodic memory that involves recollecting personal life experiences. It allows individuals to remember significant events from their past, creating a narrative of their lives. One interesting phenomenon related to autobiographical memory is the reminiscence bump. This effect refers to the tendency of adults to recall more events from their second and third decades of life — typically between ages 10 to 30 — than from other periods. This...
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Eyewitness memory refers to the recollection of events by someone who has directly witnessed them, often serving as critical evidence in legal settings. This type of memory is commonly used in criminal cases where a witness describes details like a suspect's appearance, clothing, or behavior during a crime. However, despite its perceived reliability, eyewitness memory is prone to significant errors.
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Storage01:23

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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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Flashbulb Memory01:16

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A flashbulb memory is a highly vivid and detailed memory, often linked to events of significant emotional impact. These memories stand out in contrast to everyday memories due to their clarity and the precision with which they are recalled. The strong emotions associated with the event act as a catalyst, ensuring that specific details, such as one's location, actions, and even peripheral elements, are etched into memory with remarkable accuracy. For example, many people can vividly recall...
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Implicit Memories01:24

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Implicit memories, also known as non-declarative memories, are long-term memories that function outside of conscious awareness. These memories influence behavior and skills without explicit knowledge. This type of memory is evident in tasks like playing tennis, snowboarding, and texting. Implicit memory has three subsystems: procedural memory, conditioning, and priming. This type of memory is essential in various activities, from everyday tasks to specialized skills.
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Explicit Memories01:27

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Explicit memories, also known as declarative memories, are consciously remembered, recalled, and reported. Studying for a chemistry exam involves material that will become part of explicit memory. There are two types of explicit memory: episodic and semantic.
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Related Experiment Video

Updated: Dec 18, 2025

Brain Imaging Investigation of the Neural Correlates of Emotional Autobiographical Recollection
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Effective connectivity during autobiographical memory search.

Norberto Eiji Nawa1,2, Hiroshi Ando1,2

  • 1Center for Information and Neural Networks (CiNet), National Institute of Information and Communications Technology (NICT), Osaka, Japan.

Brain and Behavior
|June 16, 2020
PubMed
Summary
This summary is machine-generated.

Brain imaging reveals how prefrontal and posterior midline regions coordinate autobiographical memory search. Successful memory retrieval involves enhanced connectivity between the hippocampus, vmPFC, and angular gyrus.

Keywords:
autobiographical memorydynamic causal modelingepisodic memoryhippocampusventromedial prefrontal cortex

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Area of Science:

  • Neuroscience
  • Cognitive Neuroscience
  • Neuroimaging

Background:

  • Autobiographical memory (AM) retrieval involves a widespread network of brain regions.
  • Understanding the effective connectivity and directed interactions within this network is crucial for elucidating memory processes.

Purpose of the Study:

  • To investigate the effective connectivity within a left-hemispheric network during cued autobiographical memory search using dynamic causal modeling (DCM).
  • To identify the key brain regions that drive and modulate activity during successful AM retrieval.

Main Methods:

  • Functional MRI (fMRI) data were collected from participants performing a cued AM search task.
  • Dynamic Causal Modeling (DCM) was employed to analyze directed functional interactions between the ventromedial prefrontal cortex (vmPFC), dorsomedial prefrontal cortex (dmPFC), dorsolateral prefrontal cortex (dlPFC), hippocampus, angular gyrus, and posterior cingulate cortex (RSC/PCC/Prec).

Main Results:

  • During AM search, the vmPFC, dlPFC, and RSC/PCC/Prec primarily drove network activity.
  • Successful memory retrieval (Hits) was associated with increased hippocampal influence on the vmPFC and angular gyrus.
  • Increased influence of the RSC/PCC/Prec on the dlPFC and dmPFC was observed during successful retrieval, indicating a distributed network modulation.

Conclusions:

  • Prefrontal and posterior midline cortical regions, along with the dlPFC, play a coordinating role in AM search.
  • The angular gyrus and hippocampus are engaged when retrieval is successful, acting upon conditions established by the coordinating regions.
  • Successful autobiographical memory retrieval relies on the dynamic interplay and effective connectivity within a distributed brain network.