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Related Concept Videos

Long-term Potentiation01:35

Long-term Potentiation

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

Long-term Potentiation

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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Neuroplasticity

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Updated: May 11, 2026

Combined Shuttle-Box Training with Electrophysiological Cortex Recording and Stimulation as a Tool to Study Perception and Learning
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Stimulating prefrontal cortex facilitates training transfer by increasing representational overlap.

Yohan Wards1, Shane E Ehrhardt1, Kelly G Garner1,2,3,4

  • 1School of Psychology, The University of Queensland, McElwain Building, Campbell Road, St Lucia, Queensland 4072, Australia.

Cerebral Cortex (New York, N.Y. : 1991)
|May 21, 2024
PubMed
Summary
This summary is machine-generated.

Transcranial direct current stimulation (tDCS) combined with multitasking training improved learning generalization. Left prefrontal cortex tDCS specifically enhanced transfer to new tasks by altering neural representations.

Keywords:
cognitive traininglearningmachine learningtDCStransfer

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Area of Science:

  • Cognitive Neuroscience
  • Neuroimaging

Background:

  • Multitasking difficulties may stem from generalizing learning across tasks.
  • Training reduces representational overlap in brain regions, mitigating these costs.
  • Transcranial direct current stimulation (tDCS) can enhance training-induced performance gains.

Purpose of the Study:

  • To investigate the neural mechanisms underlying the interaction between prefrontal cortex tDCS and multitasking training.
  • To determine if combined tDCS and training alters task-associated representational overlap.
  • To assess the impact on generalization of learning to novel tasks.

Main Methods:

  • 178 participants received left or right prefrontal cortex tDCS paired with multitasking training.
  • Functional magnetic resonance imaging (fMRI) data were collected pre- and post-training.
  • Machine learning was used to analyze the overlap of neural activity in task-relevant brain regions.

Main Results:

  • Left prefrontal cortex tDCS combined with multitasking training enhanced transfer to a spatial attention task (visual search).
  • Changes in classification accuracy (reduced representational overlap) in frontal, parietal, and cerebellar regions predicted visual search gains.
  • Right prefrontal cortex tDCS did not yield similar improvements in generalization.

Conclusions:

  • Prefrontal cortex tDCS can modulate training-induced changes in neural representations.
  • This modulation facilitates the generalization of learning across tasks.
  • Targeted tDCS may be a viable strategy to enhance cognitive flexibility.