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Related Concept Videos

Lateralization01:28

Lateralization

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Brain lateralization refers to the division of mental processes and functions between the two hemispheres of the brain, a phenomenon that optimizes neural efficiency and underpins complex abilities in humans. This specialization allows each hemisphere to perform tasks where it has a comparative advantage, facilitating more refined cognitive capabilities across different domains.
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The indirect motor or extrapyramidal pathways originate in the brainstem, the lower portion of the brain that connects it to the spinal cord. They consist of several distinct tracts, each with specialized functions. The four main tracts of the indirect motor pathways are the vestibulospinal tract, the reticulospinal tract, the tectospinal tract, and the rubrospinal tract.
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The somatosensory cortex in the parietal lobes is crucial for interpreting sensory data such as touch, temperature, and proprioception. The somatosensory cortex, situated in the parietal lobes, plays a vital role in interpreting sensory information like touch, temperature, and proprioception—awareness of body position. This specialized brain region features an organized structure wherein neurons at the top primarily process sensations originating from the lower body. In contrast, those at...
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Related Experiment Video

Updated: Jun 8, 2025

Evaluation of Hemisphere Lateralization with Bilateral Local Field Potential Recording in Secondary Motor Cortex of Mice
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Dynamic lateralization in contralateral-projecting corticospinal neurons during motor learning.

Jiawei Han1,2, Ruixue Wang3,4, Minmin Wang4

  • 1Department of Neurosurgery, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310058, China.

Iscience
|November 4, 2024
PubMed
Summary

Motor cortex neurons adapt during motor learning. Contralateral-projecting corticospinal neurons (cpCSNs) decrease activity during ipsilateral tasks but maintain it during contralateral tasks, showing flexible reorganization.

Keywords:
Cognitive neuroscienceMolecular neuroscienceNeuroscience

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Area of Science:

  • Neuroscience
  • Motor Control
  • Neural Plasticity

Background:

  • Motor cortex adaptability is key to understanding neural plasticity and motor learning.
  • Bilateral motor tasks present unique challenges for neural control and adaptation.

Purpose of the Study:

  • Investigate dynamic lateralization of contralateral-projecting corticospinal neurons (cpCSNs).
  • Examine how cpCSNs adapt during bilateral motor tasks.

Main Methods:

  • Utilized in vivo two-photon calcium imaging in mice.
  • Observed cpCSN activity during a "left-right" lever-press task.

Main Results:

  • cpCSNs showed decreased activity during ipsilateral motor learning.
  • cpCSNs maintained activity during contralateral motor learning.
  • Individual cpCSNs dynamically shifted engagement with ipsilateral and contralateral movements over days.

Conclusions:

  • cpCSNs exhibit adaptive changes in activation patterns during motor learning.
  • Cortical lateralization is dynamically reorganized during motor learning.
  • Findings offer insights into neuromotor rehabilitation strategies.