Cerebral Circulation and Clinical Manifestations of Injury The clinical

Cerebral circulation and clinical manifestations of

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Cerebral Circulation and Clinical Manifestations of Injury The clinical manifestations of a stroke are dependent on the area of the brain affected by the ischemia or hemorrhage. Cerebral circulation is supplied by the internal carotid arteries and the vertebral arteries. The internal carotid arteries branch off the common carotid arteries, enter the cranial vault and divide into the anterior cerebral arteries and the middle cerebral arteries. The
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2 vertebral arteries originate from the subclavian artery and run along the cervical vertebrae to the medulla oblongata. At the level of the medulla oblongata and the pons, they form the basilar artery. The basilar artery then divides to form the posterior cerebral arteries which feed the posterior portion of the brain. The Circle of Willis provides for collateral circulation for when one of the contributing arteries is obstructed. It is formed by the posterior cerebral arteries, internal carotid arteries, posterior communicating arteries, anterior cerebral arteries and anterior communicating arteries. The anterior cerebral artery serves the basal ganglia, the corpus callosum, the medial surface of the cerebral hemispheres, the superior surface of the frontal and parietal lobes. An occlusion of this artery would cause contralateral paralysis and a loss of sensation. The symptoms would be more present in the lower extremities than in the upper extremities. The middle cerebral artery supplies blood to the frontal, parietal, and temporal lobes. An occlusion of this artery would
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  • Fall '15
  • david,mary
  • Internal carotid artery, Arteries of the head and neck, Anterior cerebral artery, Middle cerebral artery, posterior cerebral artery

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