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Supplementary Motor Area Aphasia

Naoum P. Issa MD PhD — Tue, 09 Apr 2013 11:52:23 +0000

A form of trans-cortical motor aphasia (TCMA), Supplementary Motor Area aphasia can occur in strokes of the Anterior Cerebral Artery (ACA) on the dominant hemisphere. Most aphasias are the result of infarction of branches of the Middle Cerebral Artery, either affecting Broca’s area (Brodmann’s areas 44 and 45) or Wernicke’s area (Brodmann’s area 22). However aphasia […]

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Stroke, Cerebrovascular Accident, CVA

Jeffrey Waggoner MD — Fri, 15 Mar 2013 21:23:03 +0000

When an area of the brain experiences a sudden loss of blood, the event is called a stroke or cerebrovascular accident. Accompanying this circumstance is a loss of neurologic function. Strokes are broadly classified as either hemorrhagic or ischemic. An acute ischemic stroke refers to strokes caused by thrombosis or embolism and accounts for 85% […]

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Middle Cerebral Artery Territory Infarct

Christopher Buckle MD — Fri, 15 Feb 2013 15:52:32 +0000

The middle cerebral artery is the major supplier of blood to the cerebral cortex. It consists of 4 principal segments, M1-M4. M1 refers to the horizontal course of the artery from its origin at the supraclinoid internal carotid artery to the sylvian fissure. The M1 segment gives rise to medial and lateral lenticulostriate arteries which […]

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Acute Infarct on CT

Christopher Buckle MD — Wed, 13 Feb 2013 19:29:12 +0000

The recent use of intravenous tissue plasminogen activator (TPA) to treat acute stoke has resulted in the introduction of “code strokes” in many emergency rooms, which typically require the coordinated efforts of the emergency room physician, the neurologist and the neuroradiologist . Since TPA can only be administered within a narrow window (around three hours) […]

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Posterior Cerebral Artery

Christopher Buckle MD — Thu, 23 Aug 2012 04:44:51 +0000

Acute infarcts lead to cell swelling in a process called cytotoxic edema. Signal in diffusion weighted MRI (DWI) is inversely related to the degree of brownian motion of intraparenchymal water. When an infarct produces cytotoxic edema, water is trapped inside the cell results in increased DWI signal. Sometimes, increased DWI can be an artifact of […]

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Early Signs of Stroke on CT

Naoum P. Issa MD PhD — Sun, 03 Jun 2012 15:27:29 +0000

Despite its poor sensitivity for detecting embolic strokes, head CT scan remains the initial imaging modality in the work up of suspected acute stroke. The rationale is to initially rule out hemorrhagic stroke and other intra-cranial hemorrhages, for which CT is the preferred imaging modality because of its sensitivity for detecting fresh blood and its […]

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