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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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Related Experiment Video

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Symmetric Bihemispheric Postmortem Brain Cutting to Study Healthy and Pathological Brain Conditions in Humans
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Interhemispheric steal. An experimental study.

C A Tulleken, A van Dieren

    Journal of Neurosurgery
    |July 1, 1978
    PubMed
    Summary

    This study investigated blood flow in cats, revealing a phenomenon called "interhemispheric steal" syndrome. Occluding carotid arteries affected pressure in the middle cerebral artery, suggesting a redistribution of blood flow between brain hemispheres.

    Area of Science:

    • Neuroscience
    • Cerebrovascular Physiology

    Background:

    • The middle cerebral artery (MCA) is crucial for brain blood supply.
    • Understanding collateral circulation is vital for managing cerebrovascular diseases.

    Purpose of the Study:

    • To investigate the impact of carotid artery occlusion on MCA pressure in cats.
    • To explore the potential existence of the "interhemispheric steal" syndrome.

    Main Methods:

    • Pressure in the occluded MCA was measured in 21 cats via a transorbital catheter approach.
    • Temporary occlusion of ipsilateral and contralateral common carotid arteries was performed.

    Main Results:

    • Occlusion of the common carotid arteries significantly affected MCA pressure.

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  • Findings suggest a blood flow redistribution phenomenon between brain hemispheres.

    • Conclusions:

    • The study provides evidence supporting the existence of the "interhemispheric steal" syndrome.
    • This syndrome may play a role in cerebrovascular dynamics and disease.