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Related Concept Videos

Traumatic Memory01:20

Traumatic Memory

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 remembers mundane...
Repressed Memory01:16

Repressed Memory

Repressed memories are a psychological phenomenon where memories of traumatic events are unconsciously blocked from a person's awareness. This process occurs as a defense mechanism, protecting the mind from the emotional impact of distressing or painful experiences. For example, a person who has experienced childhood trauma may grow up with no conscious recollection of the event. In such cases, the memories are thought to be buried deep within the subconscious, inaccessible to the conscious...
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...
Sensory Memory01:14

Sensory Memory

Sensory memory captures information from the environment in its original form for a very brief duration, just long enough to be exposed to visual, auditory, and other senses. This type of memory is detailed and rich but quickly lost unless certain strategies are employed to transfer it into short-term or long-term memory. Sensory information is continuously bombarding the human brain, yet only a small fraction is absorbed, as most of it does not significantly impact daily life. For instance,...
Immunological Memory01:23

Immunological Memory

Immunological memory, a pivotal pillar of the adaptive immune system, is responsible for the body's ability to remember and respond more swiftly and effectively to previously encountered pathogens. This remarkable feature is what makes vaccines so effective in preventing diseases.
What is Immunological Memory?
Immunological memory is an integral function of the immune system that allows it to recognize and react more rapidly and effectively to pathogens previously encountered. This feature is...
Long-Term Memory01:18

Long-Term Memory

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.
Long-term memory can be categorized into two primary types: explicit and implicit memory. Explicit memory, also known as declarative memory, involves the conscious recollection of information that we deliberately try to remember, recall, and articulate. This type of memory encompasses specific facts, events, and...

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Related Experiment Video

Updated: May 25, 2026

Presynaptically Silent Synapses Studied with Light Microscopy
11:02

Presynaptically Silent Synapses Studied with Light Microscopy

Published on: January 4, 2010

The persistence of a silent memory.

Mikel Zaratiegui, Robert Martienssen

    Nature Genetics
    |January 28, 2012
    PubMed
    Summary

    RNA interference (RNAi) in C. elegans offspring inherits a silencing mark on target genes. This epigenetic modification, a heterochromatic mark, is stably transmitted across generations, demonstrating heritable chromatin changes induced by RNAi.

    Area of Science:

    • Molecular Biology
    • Genetics
    • Epigenetics

    Background:

    • RNA interference (RNAi) is a gene silencing mechanism.
    • In C. elegans, RNAi effects can persist across generations.
    • The molecular basis for this transgenerational inheritance of RNAi is not fully understood.

    Discussion:

    • A new study investigates the mechanisms underlying heritable RNAi in C. elegans.
    • Researchers identified a heterochromatic silencing mark associated with RNAi targets.
    • This mark is deposited and maintained on target DNA sequences.

    Key Insights:

    • RNAi triggers the deposition of a stable heterochromatic mark at target loci.
    • This epigenetic mark is heritable and passed to subsequent generations.
    • RNAi can induce lasting chromatin modifications in animals.

    More Related Videos

    The Deese-Roediger-McDermott (DRM) Task: A Simple Cognitive Paradigm to Investigate False Memories in the Laboratory
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    The Deese-Roediger-McDermott (DRM) Task: A Simple Cognitive Paradigm to Investigate False Memories in the Laboratory

    Published on: January 31, 2017

    Olfactory Context Dependent Memory: Direct Presentation of Odorants
    04:47

    Olfactory Context Dependent Memory: Direct Presentation of Odorants

    Published on: September 18, 2018

    Related Experiment Videos

    Last Updated: May 25, 2026

    Presynaptically Silent Synapses Studied with Light Microscopy
    11:02

    Presynaptically Silent Synapses Studied with Light Microscopy

    Published on: January 4, 2010

    The Deese-Roediger-McDermott (DRM) Task: A Simple Cognitive Paradigm to Investigate False Memories in the Laboratory
    07:26

    The Deese-Roediger-McDermott (DRM) Task: A Simple Cognitive Paradigm to Investigate False Memories in the Laboratory

    Published on: January 31, 2017

    Olfactory Context Dependent Memory: Direct Presentation of Odorants
    04:47

    Olfactory Context Dependent Memory: Direct Presentation of Odorants

    Published on: September 18, 2018

    Outlook:

    • This finding sheds light on the epigenetic regulation of gene silencing.
    • Understanding heritable RNAi could have implications for biotechnology and medicine.
    • Further research may explore the precise molecular pathways involved in mark deposition and maintenance.