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Related Concept Videos

Working Memory01:24

Working Memory

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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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Sensory Memory01:14

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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,...
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Vision01:24

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Vision is the result of light being detected and transduced into neural signals by the retina of the eye. This information is then further analyzed and interpreted by the brain. First, light enters the front of the eye and is focused by the cornea and lens onto the retina—a thin sheet of neural tissue lining the back of the eye. Because of refraction through the convex lens of the eye, images are projected onto the retina upside-down and reversed.
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Visual System01:26

Visual System

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Light enters the eye through the cornea, a transparent, dome-shaped surface covering the surface of the eyeball that helps to direct and focus incoming light. This light is then channeled toward the pupil, an adjustable opening whose size is controlled by the iris. The iris, a pigmented muscle, regulates the amount of light entering the eye by contracting or dilating the pupil, thereby ensuring optimal light levels for clear vision.
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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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Chunking and Rehearsal in Sensory Memory01:22

Chunking and Rehearsal in Sensory Memory

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Improving short-term memory can be achieved through techniques like chunking and rehearsal. Chunking involves organizing information into larger, more manageable units. This technique is particularly useful for information that exceeds the typical memory span of between five and nine items. For instance, logging into an online account with a password like "ta89vq0179gz" involves grouping letters and numbers into three chunks—ta89, vq01, and 79gz. It makes large amounts of...
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Assessing Working Memory in Children: The Comprehensive Assessment Battery for Children – Working Memory (CABC-WM)
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Assessing Working Memory in Children: The Comprehensive Assessment Battery for Children – Working Memory (CABC-WM)

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Visual working memory buffers information retrieved from visual long-term memory.

Keisuke Fukuda1, Geoffrey F Woodman2,3,4

  • 1Department of Psychology, University of Toronto Mississauga, Mississauga, ON L5L 1C6, Canada; keisuke.fukuda@utoronto.ca.

Proceedings of the National Academy of Sciences of the United States of America
|May 3, 2017
PubMed
Summary
This summary is machine-generated.

Researchers used human electrophysiology to track information retrieval from long-term memory into working memory. This study reveals working memory acts as a buffer during retrieval, with capacity limits similar to new information encoding.

Keywords:
EEGvisual long-term memory retrievalvisual working memory

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Area of Science:

  • Cognitive Neuroscience
  • Neuroscience
  • Psychology

Background:

  • Human memory comprises long-term storage and short-term storage, known as working memory.
  • Neural evidence for information transfer from long-term to working memory has been lacking.
  • High temporal resolution is needed to observe memory retrieval processes.

Purpose of the Study:

  • To provide neural evidence for the retrieval of information from long-term memory into working memory.
  • To investigate the temporal dynamics of memory retrieval using electrophysiology.
  • To understand the role of working memory in buffering retrieved information.

Main Methods:

  • Utilized human electrophysiology to monitor neural activity during memory retrieval.
  • Tracked the flow of information from long-term storage to working memory.
  • Analyzed neurophysiological patterns associated with memory retrieval and encoding.

Main Results:

  • Electrophysiology successfully tracked information retrieval into working memory.
  • Retrieval from long-term memory was limited to a few simple objects at a time.
  • Observed neurophysiological activity during retrieval mirrored that of new information encoding.

Conclusions:

  • Working memory serves as a buffer for information retrieved from long-term memory.
  • Findings reconcile theories of memory retrieval with established memory mechanisms.
  • Human electrophysiology offers a valuable tool for studying memory dynamics.