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Related Concept Videos

Long-term Potentiation01:35

Long-term Potentiation

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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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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.
Hebbian LTP
LTP can occur when...
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Related Experiment Video

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Changes in functional connectivity and GABA levels with long-term motor learning.

Cassandra Sampaio-Baptista1, Nicola Filippini2, Charlotte J Stagg1

  • 1Oxford Centre for Functional MRI of the Brain (FMRIB), Nuffield Department of Clinical Neurosciences, University of Oxford, John Radcliffe Hospital, Headington, Oxford OX3 9DU, UK.

Neuroimage
|December 3, 2014
PubMed
Summary

Different juggling practice durations yield distinct brain changes, even with similar performance gains. Shorter practice increased motor network connectivity and decreased GABA, while longer practice decreased connectivity, suggesting practice intensity influences neuroplasticity.

Keywords:
Functional connectivityGABAMotor learningPlasticity

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Area of Science:

  • Neuroscience
  • Motor Learning
  • Neuroimaging

Background:

  • Motor skill acquisition modifies primary motor cortex (M1) inhibitory circuits and functional connectivity.
  • The impact of long-term training on these neural changes and the interplay between local inhibition and functional connectivity remains unclear.

Purpose of the Study:

  • To investigate how different training durations (15 min vs. 30 min daily) of juggling practice affect functional connectivity and GABA levels in M1.
  • To explore the correlation between learning-induced changes in GABA and functional connectivity.
  • To determine if distinct practice regimes lead to differential neuroplasticity patterns.

Main Methods:

  • Utilized resting-state functional magnetic resonance imaging (rs-fMRI) to measure functional connectivity.
  • Employed MR spectroscopy to quantify GABA levels in M1.
  • Assessed changes before and after a 6-week juggling training program in two groups with differing daily practice durations.

Main Results:

  • Both low (15 min) and high (30 min) intensity groups showed significant performance improvements, with no difference between groups.
  • The low-intensity group exhibited increased motor network functional connectivity and decreased GABA.
  • The high-intensity group demonstrated decreased functional connectivity and no significant change in GABA.
  • Changes in functional connectivity correlated with performance outcomes and with changes in GABA.

Conclusions:

  • Distinct training durations induce different patterns of neuroplasticity in M1, despite comparable behavioral outcomes.
  • Learning-related alterations in resting-state network strength are partly mediated by GABAergic plasticity.
  • Practice intensity is a critical factor modulating the neural adaptations associated with motor skill learning.