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The cerebellum, while traditionally associated with motor control, also plays a crucial role in memory, particularly in procedural memory, which involves learning motor tasks that become automatic through repetition. For example, studies have shown that when the cerebellum is damaged, individuals or animals lose the ability to learn conditioned motor responses, such as the conditioned eye-blink response in classical conditioning experiments with rabbits. This study demonstrates the...
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Association areas are regions of the cerebral cortex that do not have a specific sensory or motor function. Instead, they integrate and interpret information from various sources to enable higher cognitive processes such as memory, learning, and decision-making. Some key association areas include the following:
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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 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: Mar 21, 2026

Cerebellar Regional Dissection for Molecular Analysis
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Cortical functional hierarchy disruption following subcortical stroke.

Ke Wu1, Gang Liu2, Xinyu Liang3

  • 1State Key Laboratory of Cognitive Neuroscience and Learning & IDG, McGovern Institute for Brain Research, Beijing Normal University, Beijing, China.

BMC Medicine
|March 20, 2026
PubMed
Summary

Subcortical stroke impairs brain network hierarchy, impacting sensory and association cortices. This disruption predicts neurological deficits and offers a new biomarker for stroke recovery.

Keywords:
Functional connectivityFunctional gradientNeurotransmitter systemsResting-state fMRISubcortical stroke

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Area of Science:

  • Neuroscience
  • Systems Neuroscience
  • Clinical Neurology

Background:

  • Subcortical structures are crucial for brain communication but vulnerable to stroke.
  • Subcortical stroke can cause widespread cortical dysfunction.
  • Understanding how subcortical stroke affects cortical network organization is vital.

Purpose of the Study:

  • To investigate how subcortical stroke alters the macroscale hierarchical organization of cortical networks.
  • To identify reliable neural markers for clinical outcomes after subcortical stroke.

Main Methods:

  • Analyzed resting-state fMRI data from two independent patient cohorts.
  • Mapped cortical functional organization using diffusion map embedding to derive connectivity gradients.
  • Compared gradient metrics with conventional functional connectivity and assessed predictive utility for neurological outcomes.

Main Results:

  • Subcortical stroke compressed the principal unimodal-to-transmodal gradient, reducing hierarchical differentiation.
  • Alterations were stable and aligned with neurochemical systems.
  • Gradient features outperformed conventional connectivity in predicting global neurological severity.

Conclusions:

  • Subcortical stroke disrupts cortical functional hierarchy reproducibly and in a neurochemically constrained manner.
  • Cortical gradient disruption is a robust biomarker for global neurological impairment.
  • Cortical gradients are informative tools for studying subcortical-cortical interactions and informing prognosis.