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Related Concept Videos

Implicit Memories01:24

Implicit Memories

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.
One key aspect of implicit...
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Working memory refers to a combination of components, including short-term memory and attention, that allow an individual to hold information temporarily as we perform cognitive tasks. It is an essential cognitive function that enables the execution of complex tasks such as problem-solving, comprehension, and reasoning. Unlike short-term memory, which simply involves the storage of information for a brief period, working memory involves the active manipulation and processing of this information.
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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

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Developing Neuroimaging Phenotypes of the Default Mode Network in PTSD: Integrating the Resting State, Working Memory, and Structural Connectivity
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Published on: July 1, 2014

Sustained activity within the default mode network during an implicit memory task.

Jiongjiong Yang1, Xuchu Weng, Yufeng Zang

  • 1Department of Psychology, Peking University, Beijing, China. yangjj@pku.edu.cn

Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
|June 26, 2009
PubMed
Summary
This summary is machine-generated.

The default mode network (DMN) remains active during unconscious processing in implicit memory tasks. However, this network deactivates during explicit memory tasks requiring conscious retrieval.

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Area of Science:

  • Neuroscience
  • Cognitive Neuroscience
  • Neuroimaging

Background:

  • The default mode network (DMN) comprises brain regions like the posterior cingulate cortex (PCC) and ventral medial prefrontal cortex (vmPFC).
  • These regions show higher activity during rest than during cognitive tasks.
  • The DMN's association with unconscious states is suggested, but its role in unconscious processing during tasks is unclear.

Purpose of the Study:

  • To investigate whether the default mode network (DMN) is associated with unconscious processing during tasks in healthy subjects.
  • To compare DMN activity during implicit (unconscious) and explicit (conscious) memory tasks.

Main Methods:

  • Functional magnetic resonance imaging (fMRI) was used to analyze brain activity.
  • Participants performed implicit and explicit memory tasks.
  • Signal changes in DMN regions were analyzed relative to baseline and between tasks.

Main Results:

  • DMN activation during the implicit task was similar to baseline, with exceptions in the left angular gyrus and insula.
  • A significant deactivation of DMN regions was observed during the explicit task compared to the implicit task.
  • The left angular gyrus and left middle temporal gyrus showed different patterns of activation.

Conclusions:

  • Default mode network activity is sustained during implicit memory tasks, suggesting involvement in unconscious processing.
  • The DMN is suspended during explicit memory tasks requiring conscious retrieval.
  • These findings support the role of the DMN in unconscious processing during implicit memory tasks.