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The brain processes sensory information rapidly due to parallel processing, which involves sending data across multiple neural pathways at the same time. This method allows the brain to manage various sensory qualities, such as shapes, colors, movements, and locations, all concurrently. For instance, when observing a forest landscape, the brain simultaneously processes the movement of leaves, the shapes of trees, the depth between them, and the various shades of green. This enables a quick and...
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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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Related Experiment Video

Updated: Dec 9, 2025

Inducing Long-Term Plasticity of Intrinsic Neuronal Excitability in Neurons of the Dorsal Lateral Geniculate Nucleus
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Inducing Long-Term Plasticity of Intrinsic Neuronal Excitability in Neurons of the Dorsal Lateral Geniculate Nucleus

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Recurrent Processing Drives Perceptual Plasticity.

Ke Jia1, Elisa Zamboni1, Valentin Kemper2

  • 1Department of Psychology, University of Cambridge, Cambridge CB2 3EB, UK.

Current Biology : CB
|September 5, 2020
PubMed
Summary
This summary is machine-generated.

Learning reshapes the adult brain

Keywords:
experience-dependent plasticitylayer-to-layer functional connectivitylearningperceptual decisionsultra-high-field brain imagingvisual cortex

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Sensory Processing

Background:

  • Experience and learning are crucial for interpreting sensory information and making decisions.
  • Standard functional magnetic resonance imaging (fMRI) lacks the resolution to detail the precise brain mechanisms of sensory plasticity.
  • Understanding how the adult brain changes with experience is key to understanding perception.

Purpose of the Study:

  • To investigate experience-dependent plasticity in the human brain at a fine scale using advanced neuroimaging.
  • To determine how orientation discrimination training affects neural representations across different cortical layers in the visual cortex.
  • To elucidate the role of plasticity in gating perceptual decisions.

Main Methods:

  • Utilized ultra-high-field (7T) functional imaging with sub-millimeter resolution.
  • Implemented an orientation discrimination training paradigm.
  • Analyzed changes in neural representations and layer-to-layer connectivity across cortical depths in the visual cortex (V1) and occipito-parietal regions.

Main Results:

  • Learning-induced alterations in orientation-specific representations were observed primarily in the superficial layers of V1, not deeper layers.
  • These findings suggest plasticity mechanisms involving horizontal connections.
  • Training increased feedforward connectivity more than feedback connectivity in occipito-parietal regions, linking plasticity to decision-making.

Conclusions:

  • Sensory learning induces plasticity at a finer scale than previously detectable, specifically in superficial V1 layers.
  • Plasticity mechanisms involve changes in both local cortical circuits and long-range connections.
  • These micro-circuit changes are critical for re-weighting sensory signals and improving perceptual decisions.