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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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The cerebellum, while traditionally associated with motor control, also plays a crucial role in memory, particularly in procedural memory, which involves learning motor tasks that become automatic through repetition. For example, studies have shown that when the cerebellum is damaged, individuals or animals lose the ability to learn conditioned motor responses, such as the conditioned eye-blink response in classical conditioning experiments with rabbits. This study demonstrates the...
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Higher Mental Functions of Brain: Learning and Memory01:26

Higher Mental Functions of Brain: Learning and Memory

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Memory is one of the most vital higher mental functions of the brain. Memory is closely related to learning because it enables us to retain information and experiences from our past to use them in our present life. It also helps us to remember facts, events, and skills, such as riding a bike or swimming. There are two types of memory — declarative memory, which involves memorizing facts or events, and procedural memory, which enables us to remember how to do something like writing or...
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Synaptic Signaling01:09

Synaptic Signaling

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Neurons communicate at synapses, or junctions, to excite or inhibit the activity of other neurons or target cells, such as muscles. Synapses may be chemical or electrical.
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Role of Neurotransmitters in Memory01:23

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Neurotransmitters are integral to the brain's communication system, enabling neurons to transmit signals across synapses. This chemical exchange underpins various cognitive functions, including memory processes. The role of neurotransmitters in memory is multifaceted, influencing the encoding, consolidation, and retrieval of memories through their action on different neural circuits.
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Integration of Synaptic Events01:28

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Synaptic integration mainly includes the summation of graded potentials. Graded potentials, regardless of their type, cause subtle alterations in membrane voltage, resulting in either depolarization or hyperpolarization. These incremental changes, when combined or summed, can propel the neuron toward its threshold. Consider, for example, a membrane experiencing a +15 mV shift, causing it to depolarize from -70 mV to -55 mV. In this scenario, graded potentials govern the membrane's ability to...
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Related Experiment Video

Updated: Mar 9, 2026

Assessing Working Memory in Children: The Comprehensive Assessment Battery for Children &#8211; 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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Synaptic Correlates of Working Memory Capacity.

Yuanyuan Mi1, Mikhail Katkov2, Misha Tsodyks3

  • 1Brain Science Center, Institute of Basic Medical Sciences, Beijing 100850, China; Department of Neurobiology, Weizmann Institute of Science, Rehovot 76100, Israel; Department of Neuroscience, Columbia University, New York, NY 10032, USA.

Neuron
|January 3, 2017
PubMed
Summary
This summary is machine-generated.

Human working memory capacity, typically four items, is explained by synaptic depression dynamics. External excitation can regulate this capacity, allowing for adjustments to cognitive load.

Keywords:
attractor neural networksintegrate and fire modelmodelingneural networksrate modelshort-term memoryshort-term synaptic plasticitysynaptic depressionsynaptic facilitation

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Working Memory Training for Older Participants: A Control Group Training Regimen and Initial Intellectual Functioning Assessment
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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Computational Neuroscience

Background:

  • Human working memory capacity is limited, often to four items, impacting cognitive task performance.
  • The neuronal basis for this working memory limitation remains poorly understood.

Purpose of the Study:

  • To analytically estimate working memory capacity within the synaptic theory.
  • To explore the role of synaptic properties and external excitation in regulating memory capacity.

Main Methods:

  • Utilizing the framework of synaptic theory of working memory.
  • Analytical estimation of capacity based on synaptic depression and current time constants.
  • Modeling the effect of external excitation on memory load regulation.

Main Results:

  • Working memory capacity is analytically estimated to scale with the ratio of short-term synaptic depression time constant to synaptic current time constant.
  • External excitation can regulate the number of items held in working memory.
  • The system can be tuned for desired cognitive load and clear existing items.

Conclusions:

  • Synaptic depression dynamics provide a theoretical basis for working memory capacity limitations.
  • External modulation offers a mechanism for dynamic control of working memory.
  • This framework advances understanding of the neuronal underpinnings of cognitive capacity.