As bordering tissue starts to become affected during a stroke, increasing areas of hypoperfusion lead to a series of ring-like zones of damage in a process called ____.

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Ischemic penumbra refers to the region of brain tissue that is at risk of damage but not yet irreversibly injured during a stroke. As hypoperfusion spreads, the region of ischemic penumbra expands and can eventually progress to irreversible damage. This process can create a series of concentric zones of damage, resulting in the appearance of "rings" on imaging studies. Thrombotic diaschisis refers to the physiological response of remote, unaffected brain tissue to a stroke, and hemorrhagic aphasia refers to difficulty with language resulting from bleeding in the brain. Homonymous hemianopia is a visual field defect that can occur with stroke but is not related to the process of ring-like zones of damage.

As Bordering Tissue Starts to Become Affected During a Stroke