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Related Experiment Videos

Extrastriate cortical areas activated during visual discrimination in man

P E Roland, E Skinhøj

    Brain Research
    |October 5, 1981
    PubMed
    Summary

    Visual shape discrimination significantly elevates regional cerebral blood flow (rCBF) in specific human extrastriate cortex areas. Key regions include frontal eye fields and lateral occipital cortex, showing marked increases during this cognitive task.

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    Area of Science:

    • Neuroscience
    • Cognitive Neuroscience
    • Neuroimaging

    Background:

    • The extrastriate cerebral cortex plays a crucial role in visual processing.
    • Understanding regional brain activity during specific cognitive tasks is vital for mapping brain function.

    Purpose of the Study:

    • To investigate changes in regional cerebral blood flow (rCBF) in the human extrastriate cortex during visual shape discrimination.
    • To identify specific brain regions that show altered blood flow during this visual task.

    Main Methods:

    • Regional cerebral blood flow (rCBF) was measured using neuroimaging techniques.
    • Measurements were taken in 254 distinct regions of the human extrastriate cerebral cortex.
    • rCBF was assessed during both resting state and active visual shape discrimination.

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    Main Results:

    • Visual shape discrimination markedly increased rCBF in several key areas.
    • Significant rCBF increases were observed in the frontal eye fields, upper prefrontal cortex, lateral occipital cortex, and superior parietal cortex.
    • Moderate rCBF increases were noted in the inferotemporal cortex, parietotemporo-occipital region, and parts of the lateral prefrontal cortex.

    Conclusions:

    • Visual shape discrimination is associated with significant regional cerebral blood flow changes in the extrastriate cortex.
    • Specific areas, including frontal and occipital regions, are highly activated during this visual processing task.