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Related Experiment Videos

[Rapid thermal waves propagated through the cerebral cortex during visual stimulation].

I A Shevelev, E N Tsykalov, G A Sharaev

    Neirofiziologiia = Neurophysiology
    |January 1, 1989
    PubMed
    Summary

    New brain imaging reveals fast thermowaves spreading across the cortex in rats. These temperature waves, detected via thermoencephaloscopy (TES), may reflect visual attention scanning.

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    Neuroscience and behavioral physiology·2009

    Area of Science:

    • Neuroscience
    • Neuroimaging
    • Physiology

    Context:

    • Investigated fast thermowaves in rat brains using thermoencephaloscopy (TES).
    • TES allows neuroimaging through the intact skull.
    • Stimulation via rhythmic light flashes.

    Purpose:

    • To investigate fast thermowaves spreading across the brain cortex.
    • To characterize the properties of these thermowaves (amplitude, speed, trajectory).
    • To explore the potential functional significance of thermowaves in visual attention.

    Summary:

    • Fast thermowaves (0.005–0.1°C, 1.2–11.4s) were detected spreading across the rat cortex via TES.
    • Waves appeared before and after light stimulation, often in contralateral visual cortex, spreading ipsilaterally.

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  • Observed local circular waves and varied trajectories, suggesting complex cortical processing.

    • Impact:

    • Introduces thermoencephaloscopy (TES) as a novel neuroimaging technique.
    • Provides insights into rapid cortical dynamics and temperature wave propagation.
    • Suggests a potential link between thermowaves and selective visual attention mechanisms.