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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.
Hebbian LTP
LTP can occur when presynaptic neurons...

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Related Experiment Video

Updated: Jun 16, 2026

Transcranial Direct Current Stimulation and Simultaneous Functional Magnetic Resonance Imaging
13:35

Transcranial Direct Current Stimulation and Simultaneous Functional Magnetic Resonance Imaging

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Repeated tDCS at Clinically Relevant Field Intensity Can Boost Concurrent Motor Learning in Rats.

Forouzan Farahani1, Mihály Vöröslakos2, Andrew M Birnbaum1

  • 1Biomedical Engineering Department, City College of New York, New York, New York 10031.

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience
|April 11, 2025
PubMed
Summary
This summary is machine-generated.

Weak electrical stimulation using transcranial direct current stimulation (tDCS) enhanced motor skill learning in rats when applied concurrently with behavioral training. This effect was specific to right-pawed animals and did not alter corticospinal excitability.

Keywords:
brain stimulationmotor learningreaching behavior

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Area of Science:

  • Neuroscience
  • Motor Learning
  • Brain Stimulation

Background:

  • Transcranial direct current stimulation (tDCS) uses weak electric fields, with limited demonstrated behavioral effects in animal models.
  • Previous research has not established whether concurrent behavioral training and repeated tDCS sessions can yield significant outcomes.
  • Investigating tDCS efficacy in animal models is crucial for understanding its therapeutic potential in humans.

Purpose of the Study:

  • To test the hypothesis that weak tDCS, when combined with behavioral training and repeated sessions, produces sizable behavioral effects in a rodent model.
  • To evaluate the impact of concurrent anodal tDCS and motor skill training on learning dynamics and corticospinal excitability.
  • To explore potential interactions between tDCS effects, paw preference, and motor performance.

Main Methods:

  • A rodent model of dexterous motor skill learning using an automated pellet-reaching task was employed.
  • Male rats underwent 10 daily sessions of concurrent epicranial tDCS (2 V/m at the motor cortex) with behavioral training.
  • Behavior was recorded using high-speed video, and motor-evoked potentials (MEPs) were measured via epidural microstimulation.

Main Results:

  • The anodal tDCS group showed a significantly higher rate of motor skill learning compared to the sham-control group (p=0.008).
  • tDCS did not systematically affect motor-evoked potentials, indicating no significant change in corticospinal excitability.
  • Post hoc analysis revealed that tDCS modulated motor learning specifically in right-pawed animals, improving reaching success and reducing stereotypy.

Conclusions:

  • Repeated and concurrent anodal tDCS can enhance motor skill learning at clinically relevant field intensities in a rodent model.
  • The observed motor learning enhancement by tDCS interacted with paw preference and was independent of changes in corticospinal excitability.
  • These findings support the potential of targeted tDCS protocols for improving motor rehabilitation strategies.