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Related Concept Videos

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The brainstem, located inferior to the brain and superior to the spinal cord, serves as a bridge between the cerebrum and the spinal cord. It plays a vital role in relaying information and controlling critical life functions. It comprises three primary regions: the midbrain, pons, and medulla oblongata.
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Functional MRI Reveals Locomotion-Control Neural Circuits in Human Brainstem.

Pengxu Wei1,2, Tong Zou2, Zeping Lv1,2

  • 1School of Biological Science and Medical Engineering and Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, 37# Xueyuan Road, Haidian District, Beijing 100083, China.

Brain Sciences
|October 23, 2020
PubMed
Summary

The human brainstem, including the cuneiform nucleus (CN) and pedunculopontine nucleus (PPN), controls coordinated walking. Brain network analysis reveals distinct functional units for locomotion and dual-task walking.

Keywords:
cuneiform nucleusfunctional magnetic resonance imaginghuman brainstemlocomotionpedunculopontine nucleus

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Area of Science:

  • Neuroscience
  • Motor Control
  • Human Brain Imaging

Background:

  • The cuneiform nucleus (CN) and pedunculopontine nucleus (PPN) in the midbrain are known to control coordinated locomotion in vertebrates.
  • However, their specific roles and mechanisms in human locomotion remain incompletely understood.

Purpose of the Study:

  • To investigate the involvement of the CN, PPN, and other brainstem regions in human locomotion control.
  • To elucidate the functional brain network organization underlying gait and walking automaticity in humans.

Main Methods:

  • Functional magnetic resonance imaging (fMRI) was employed to observe brain activity during simulated gait tasks.
  • Functional connectivity and network analysis techniques were used to construct and analyze brain networks.

Main Results:

  • Simulated gait evoked significant activations in the CN, PPN, and other brainstem regions.
  • Bilateral CN-PPN and pons-medulla regions formed two distinct functional modules, representing brainstem units for locomotion.
  • Brainstem circuits showed specific connectivity patterns related to dual-task walking and automaticity.

Conclusions:

  • The cuneiform nucleus, pedunculopontine nucleus, and other brainstem areas play a crucial role in human locomotion control.
  • Brainstem functional units and their network connectivity are vital for gait regulation, dual-task walking, and walking automaticity.