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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...
Motor and Sensory Areas of the Cortex01:14

Motor and Sensory Areas of the Cortex

The cerebral cortex, the brain's outermost layer, is pivotal in processing complex cognitive tasks, emotions, and various sensory inputs and executing voluntary motor activities. This intricate structure is divided into three primary functional areas: the motor areas, sensory areas, and association areas.
Motor Areas
The motor areas located in the frontal lobe are central to controlling voluntary movements. This region is further subdivided into the primary motor cortex and the premotor cortex.
Direct Motor Pathways01:11

Direct Motor Pathways

The direct motor pathways, also known as the pyramidal tracts, are a group of neural pathways that originate in the brain and descend through the spinal cord. They control the voluntary movement of the body. There are two major direct motor pathways: the corticospinal and the corticobulbar tracts.
The corticospinal tract is responsible for the voluntary movement of the limbs and trunk. It originates in the cerebral cortex of the brain and descends through the cerebrum's internal capsule and the...
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

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Study Motor Skill Learning by Single-pellet Reaching Tasks in Mice
06:04

Study Motor Skill Learning by Single-pellet Reaching Tasks in Mice

Published on: March 4, 2014

Dopamine in motor cortex is necessary for skill learning and synaptic plasticity.

Katiuska Molina-Luna1, Ana Pekanovic, Sebastian Röhrich

  • 1Clinical Neurorehabilitation, Department of Neurology, University of Zurich, Zurich, Switzerland.

Plos One
|September 18, 2009
PubMed
Summary

Dopamine in the rat primary motor cortex (M1) is crucial for learning new motor skills and enhances brain plasticity. Restoring dopamine levels in M1 improved motor skill acquisition.

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Area of Science:

  • Neuroscience
  • Motor Control
  • Synaptic Plasticity

Background:

  • Preliminary evidence suggests oral dopamine aids motor skill learning and post-stroke movement recovery.
  • The underlying mechanisms for these effects remain largely unknown.
  • Dopaminergic signaling is implicated in various cognitive and motor functions.

Purpose of the Study:

  • To elucidate the mechanism by which dopamine influences motor skill learning.
  • To investigate the role of dopaminergic terminals and receptors in the primary motor cortex (M1).
  • To determine the impact of dopamine on M1 synaptic plasticity.

Main Methods:

  • Experiments were conducted in rats.
  • Dopaminergic terminals in M1 were eliminated and restored.
  • D1 and D2 dopamine receptors in M1 were reversibly blocked.
  • Motor skill acquisition and execution were assessed.
  • Long-term potentiation (LTP) in M1 was measured.

Main Results:

  • Eliminating dopaminergic terminals in M1 specifically impaired novel motor skill acquisition, but not execution of learned skills.
  • Dopamine (DA) substitution restored motor skill acquisition.
  • Reversible blockade of M1 D1 and D2 receptors temporarily impaired skill acquisition but not execution.
  • Receptor blockade reduced M1 long-term potentiation (LTP).

Conclusions:

  • Dopaminergic signaling in M1 is essential for motor skill learning.
  • Dopamine in M1 enhances synaptic plasticity, specifically LTP.
  • These findings establish a functional role for dopamine in M1 for optimizing novel motor skill acquisition.