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Related Concept Videos

Neuroplasticity01:01

Neuroplasticity

Neuroplasticity reflects the brain's remarkable capacity to adapt and evolve, responding dynamically to learning, experiences, or injury by reorganizing its neural circuitry. This reorganization involves creating new neural connections and refining old ones through a series of biological processes that contribute to the brain's lifelong development and adaptability.
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Plasticity is the property where an object loses its elasticity and undergoes irreversible deformation, even after the deformation forces are eliminated. If a material deforms irreversibly without increasing stress or load, then this is called ideal plasticity. For example, when a force is applied to an aluminum rod, it changes its shape, but it does not return to its original shape once the force is removed. Plastic deformation or ductility is thus a permanent deformation or change in the...
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Long-term Potentiation01:35

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Long-term potentiation, or LTP, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTP is the process of synaptic strengthening that occurs over time between pre- and postsynaptic neuronal connections. The synaptic strengthening of LTP works in opposition to the synaptic weakening of long-term depression (LTD) and together are the main mechanisms that underlie learning and memory.
Long-term Potentiation01:25

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Long-term potentiation, or LTP, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTP is the process of synaptic strengthening that occurs over time between pre and postsynaptic neuronal connections. The synaptic strengthening of LTP works in opposition to the synaptic weakening of long-term depression (LTD) and together are the main mechanisms that underlie learning and memory.
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Calcium Ion Concentration Mechanism
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Measuring Neural Mechanisms Underlying Sleep-Dependent Memory Consolidation During Naps in Early Childhood
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Measuring Neural Mechanisms Underlying Sleep-Dependent Memory Consolidation During Naps in Early Childhood

Published on: October 2, 2019

Sleep and plasticity.

Sidarta Ribeiro1

  • 1Brain Institute, Federal University of Rio Grande do Norte (UFRN), Natal, Rio Grande do Norte, Brazil. sidartaribeiro@neuro.ufrn.br

Pflugers Archiv : European Journal of Physiology
|September 28, 2011
PubMed
Summary
This summary is machine-generated.

Sleep facilitates synaptic plasticity by simultaneously downscaling and upscaling synapses, a process termed synaptic embossing. This dual action supports memory acquisition and consolidation during waking periods.

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Area of Science:

  • Neuroscience
  • Sleep Science
  • Synaptic Plasticity

Background:

  • Sleep's role in cognition is linked to synaptic changes, but the exact nature of these changes remains debated.
  • Two main hypotheses exist: global synaptic downscaling for memory acquisition and experience-dependent synaptic upscaling for memory consolidation.

Purpose of the Study:

  • To review molecular and physiological evidence for sleep-dependent synaptic changes.
  • To propose a unified model of synaptic embossing during sleep.

Main Methods:

  • Review of existing molecular and physiological studies on sleep and synaptic plasticity.
  • Emphasis on the role of calcium signaling pathways.

Main Results:

  • Evidence supports both synaptic downscaling and upscaling during sleep.
  • These processes appear to affect different sets of synapses.

Conclusions:

  • Sleep promotes experience-dependent synaptic embossing: simultaneous non-Hebbian downscaling and Hebbian upscaling.
  • This process differentially affects synapses based on their activation during memory encoding.
  • Synaptic embossing reconciles conflicting views on sleep-dependent synaptic plasticity.