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Related Concept Videos

Association Areas of the Cortex01:21

Association Areas of the Cortex

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:
Prefrontal Association Area: This area is located in the frontal lobe and is involved in planning, decision-making, and moderating social behavior. It connects with primary motor areas,...
Visual Agnosia01:12

Visual Agnosia

Visual agnosia is a condition characterized by the inability to recognize visually presented objects despite having normal vision. For instance, a person with visual agnosia can describe the shape and color of an object but cannot identify or name it. This impairment does not affect their visual field, acuity, color vision, brightness discrimination, language, or memory. An example of this condition in a social setting is someone at a dinner party asking for "that silver thing with a round end"...

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Related Experiment Video

Updated: Jul 14, 2026

Functional Magnetic Resonance Imaging (fMRI) of the Visual Cortex with Wide-View Retinotopic Stimulation
07:11

Functional Magnetic Resonance Imaging (fMRI) of the Visual Cortex with Wide-View Retinotopic Stimulation

Published on: December 8, 2023

fMRI demonstrates diaschisis in the extrastriate visual cortex.

Amy Brodtmann, Aina Puce, David Darby

    Stroke
    |June 30, 2007
    PubMed
    Summary

    Cortical diaschisis, a brain function disruption, impacts visual recovery after stroke. Functional MRI showed reduced activation in visual areas, which later improved, suggesting diaschisis is key to visual system healing.

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    Related Experiment Videos

    Last Updated: Jul 14, 2026

    Functional Magnetic Resonance Imaging (fMRI) of the Visual Cortex with Wide-View Retinotopic Stimulation
    07:11

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    Published on: December 8, 2023

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    Area of Science:

    • Neuroscience
    • Neurology
    • Radiology

    Background:

    • Investigating the role of diaschisis in visual cortex recovery post-stroke.
    • Assessing functional magnetic resonance imaging (fMRI) for evaluating visual diaschisis.
    • Understanding the dependence of visual regions like the fusiform gyri on striate regulation.

    Discussion:

    • fMRI revealed ipsilesional cortical diaschisis in ventral extrastriate areas.
    • Observed absent or reduced activation in these areas shortly after stroke.
    • Demonstrated a recovery of activation at 6 months post-stroke.

    Key Insights:

    • Cortical diaschisis significantly affects visual system function after stroke.
    • Serial fMRI can detect and monitor visual diaschisis.
    • Diaschisis plays a crucial, though often under-recognized, role in visual recovery.

    Outlook:

    • Further research into the mechanisms of diaschisis in visual recovery.
    • Exploring therapeutic strategies targeting diaschisis to enhance visual rehabilitation.
    • Expanding the investigation of diaschisis to other cortical networks beyond the visual system.