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Related Concept Videos

System of Memory01:23

System of Memory

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Memory is categorized into three major systems: sensory memory, short-term memory (STM), and long-term memory (LTM). These systems differ in their capacity and the duration for which they can hold information. Sensory memory captures raw sensory input from the environment, holding it for just a few seconds or less. For example, on hearing a brief, loud sound, like a car horn honking, the sound seems to linger in the mind for a moment even after it stops. This is an instance of sensory memory...
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Working Memory01:24

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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...
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Long-Term Memory01:18

Long-Term Memory

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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.
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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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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Repressed Memory01:16

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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...
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Immunological Memory01:23

Immunological Memory

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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.
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Related Experiment Video

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A Real-world What-Where-When Memory Test
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Working Memory 2.0.

Earl K Miller1, Mikael Lundqvist1, André M Bastos1

  • 1The Picower Institute for Learning and Memory, Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.

Neuron
|October 26, 2018
PubMed
Summary
This summary is machine-generated.

New findings reveal how working memory works by strengthening information through synaptic changes and executive control via brainwave interactions. This research enhances our understanding of cognitive control and memory.

Keywords:
bottom-upcognitioncortexoscillationsprefrontal cortexsynchronytop-downworking memory

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Area of Science:

  • Neuroscience
  • Cognitive Science

Background:

  • Working memory enables cognitive control beyond reflexive responses.
  • Classic models focused on persistent neural spiking for information maintenance.
  • Executive control mechanisms within working memory require further elucidation.

Purpose of the Study:

  • To review theoretical and empirical studies on working memory mechanisms.
  • To propose updates to classic models of working memory.
  • To elucidate the neural basis of working memory maintenance and executive control.

Main Methods:

  • Review of recent theoretical and empirical studies.
  • Analysis of synaptic weight changes and sparse spiking patterns.
  • Investigation of network oscillations in distinct cortical layers.

Main Results:

  • Synaptic weight changes between sparse bursts of spiking strengthen working memory maintenance.
  • Executive control involves interplay between gamma oscillations (30-100 Hz) in superficial cortical layers (2/3) and alpha/beta oscillations (10-30 Hz) in deep layers (5/6).
  • Deep-layer oscillations regulate bottom-up sensory information processed by superficial layers.

Conclusions:

  • Interactions between network oscillations in distinct cortical layers are crucial for working memory maintenance.
  • Executive control of working memory relies on the interplay between superficial and deep cortical layer network rhythms.
  • This model provides a more comprehensive understanding of working memory's dual functions.