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Related Concept Videos

Cerebral Hemispheres01:05

Cerebral Hemispheres

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The human brain, a complex organ, is functionally divided into two cerebral hemispheres—left and right. These hemispheres are interconnected by a structure of paramount importance, the corpus callosum. This substantial bundle of neural fibers is not just a bridge between the hemispheres but a crucial element for the brain's comprehensive functioning. It enables efficient communication between the two hemispheres, allowing each side of the brain to control and receive sensory and motor...
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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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The hippocampus, a critical brain structure, plays an essential role in memory processing, particularly in the formation and retrieval of memory. This small, seahorse-shaped region is located within the medial temporal lobe, with one hippocampus in each brain hemisphere. Experimental studies involving lesions in the hippocampi of rats have demonstrated significant impairments in tasks such as object recognition and maze navigation, indicating the hippocampus involvement in both recognition and...
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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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Altered callosal morphology in post-stroke cognitive impairment.

Xiaoli Zhou1, Huan Li1, Tao Li1

  • 1Department of Radiology, Zhongnan Hospital of Wuhan University, Wuchang District, Wuhan City 430071, Hubei Province, China.

Brain Research
|November 4, 2024
PubMed
Summary

Morphological changes in the corpus callosum (CC) are linked to post-stroke cognitive impairment (PSCI). Reduced CC area and circularity in PSCI patients correlate with cognitive decline, suggesting CC morphology as a potential diagnostic marker.

Keywords:
Cognitive dysfunctionCorpus callosumReceiver Operating CharacteristicStroke

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Area of Science:

  • Neuroimaging
  • Neurology
  • Cognitive Neuroscience

Background:

  • Stroke is a leading cause of death and cognitive impairment.
  • Post-stroke cognitive impairment (PSCI) is a common complication, but its neural basis is not fully understood.
  • The corpus callosum (CC) is vital for interhemispheric communication; its structural changes may relate to PSCI.

Purpose of the Study:

  • To investigate morphological alterations in the CC of PSCI patients.
  • To assess the diagnostic utility of CC morphology in identifying PSCI.
  • To explore the relationship between CC changes and cognitive function after stroke.

Main Methods:

  • Structural MRI, neurobehavioral, and clinical data from 104 PSCI patients and 54 controls.
  • Analysis of CC morphology, including area, circularity, and thickness.
  • Receiver Operating Characteristic (ROC) analysis to determine diagnostic value.

Main Results:

  • PSCI patients showed reduced CC area, circularity, and genu thickness compared to controls.
  • These morphological changes significantly correlated with global cognitive function.
  • CC midbody areas demonstrated high diagnostic value for PSCI (AUC 0.748).
  • Lesion location influenced CC changes: posterior circulation lesions affected circularity, anterior circulation lesions affected area and circularity.

Conclusions:

  • Areal atrophy in the CC, especially in regions connecting to the premotor cortex and frontoparietal network, is associated with cognitive impairment in PSCI.
  • CC morphology may serve as a valuable imaging biomarker for PSCI diagnosis and prognosis.