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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.
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...
Plasticity00:58

Plasticity

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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Related Experiment Video

Updated: Jul 14, 2026

Environmental Modulations of the Number of Midbrain Dopamine Neurons in Adult Mice
09:35

Environmental Modulations of the Number of Midbrain Dopamine Neurons in Adult Mice

Published on: January 20, 2015

Boosting focally-induced brain plasticity by dopamine.

Min-Fang Kuo1, Walter Paulus, Michael A Nitsche

  • 1Department of Clinical Neurophysiology, Georg-August-University Göttingen, Robert-Koch-Str. 40, 37075 Göttingen, Germany.

Cerebral Cortex (New York, N.Y. : 1991)
|June 27, 2007
PubMed
Summary

Dopamine (DA) administration with motor cortex stimulation alters brain excitability. L-dopa enhances synapse-specific plasticity, focusing neuroplasticity in human cortical networks.

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Last Updated: Jul 14, 2026

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08:29

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Comprehensive Profiling of Dopamine Regulation in Substantia Nigra and Ventral Tegmental Area
09:54

Comprehensive Profiling of Dopamine Regulation in Substantia Nigra and Ventral Tegmental Area

Published on: August 10, 2012

Area of Science:

  • Neuroscience
  • Neurophysiology
  • Cognitive Science

Background:

  • Dopamine (DA) exhibits dual roles, causing both excitation and inhibition in the human cortex.
  • Understanding DA's functional significance in cortical processing is crucial for neuroplasticity research.

Purpose of the Study:

  • To investigate the effects of levodopa (L-dopa), a DA precursor, on neuroplasticity-inducing motor cortex stimulation protocols.
  • To elucidate how L-dopa modulates cortical excitability changes induced by transcranial direct current stimulation (tDCS) and paired associative stimulation (PAS).

Main Methods:

  • Healthy subjects received L-dopa combined with two motor cortex stimulation techniques: tDCS and PAS.
  • tDCS was used to induce general cortical excitability changes (anodal for enhancement, cathodal for depression).
  • PAS was employed to induce focal, synapse-specific excitability enhancements.

Main Results:

  • L-dopa reversed the excitability enhancement from anodal tDCS into inhibition.
  • L-dopa prolonged the excitability diminution induced by cathodal tDCS.
  • L-dopa stabilized the synapse-specific excitability increase induced by PAS.
  • Crucially, L-dopa extended the duration of all observed aftereffects approximately 20-fold.

Conclusions:

  • Dopamine (DA) administration focuses synapse-specific neuroplasticity in human cortical networks.
  • L-dopa administration significantly prolongs the aftereffects of both general and specific cortical stimulation protocols.
  • These findings highlight DA's role in refining and sustaining cortical plasticity.