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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 period is...

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Related Experiment Video

Updated: Jun 1, 2026

Developing Neuroimaging Phenotypes of the Default Mode Network in PTSD: Integrating the Resting State, Working Memory, and Structural Connectivity

Developing Neuroimaging Phenotypes of the Default Mode Network in PTSD: Integrating the Resting State, Working Memory, and Structural Connectivity

Published on: July 1, 2014

Brain activation during autobiographical memory retrieval with special reference to default mode network.

Tadashi Ino¹, Ryusuke Nakai, Takashi Azuma

¹Department of Neurology, Rakuwakai-Otowa Hospital, Otowachinjicho 2, Yamashina-ku, Kyoto 607-8062, Japan.

The Open Neuroimaging Journal

|June 7, 2011

Summary

Autobiographical memory (ABM) retrieval significantly overlaps with the default mode network (DMN). This network shows segregation, with some parts supporting ABM and others unrelated, revealing specific neural bases for ABM within the DMN.

Keywords:

Autobiographical memory default mode network functional MRI.semantic memory

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Published on: December 28, 2010

Area of Science:

Neuroscience
Cognitive Neuroscience
Neuroimaging

Background:

The default mode network (DMN) is active during rest and self-referential processing.
Previous studies suggest overlap between autobiographical memory (ABM) retrieval and the DMN.
The precise segregation and specific neural bases of ABM within the DMN remain unclear.

Purpose of the Study:

To identify DMN components related and unrelated to ABM retrieval.
To determine the neural substrates specifically involved in ABM.
To investigate the functional segregation within the DMN during memory tasks.

Main Methods:

Functional magnetic resonance imaging (fMRI) was used to study brain activity during three tasks: ABM recall, semantic memory recall, and number counting.
Tasks were matched for difficulty using reaction time.
The DMN was identified by regions showing decreased activation during semantic memory and number counting relative to rest.

Main Results:

Significant overlap was found between DMN regions and areas showing greater or lesser activation during ABM retrieval compared to rest.
ABM-specific activation, defined as overlap between ABM vs. rest and ABM vs. semantic memory contrasts, was observed.
Left-lateralized brain regions, largely within the DMN, showed ABM-specific activation.

Conclusions:

The DMN is functionally segregated, containing regions both related and unrelated to ABM.
Specific neural substrates for ABM retrieval are located within the DMN, predominantly in left-lateralized areas.
This study clarifies the relationship between the DMN and autobiographical memory processing.