CEREBRAL CIRCULATION Anterior Cerebral Artery Surface branches supply cortex and white matter of : 1)inferior frontal lobe 2)medial surface of the frontal and parietal lobes 3)anterior corpus callosum Posterior Cerebral Artery Surface branches supply cortex and white matter of: 1)medial occipital lobes 2)inferior temporal lobes 3)posterior corpus callosum Middle Cerebral Artery Surface branches supply cortex and white matter of: hemispheric convexity (all four lobes and insula). Insula
CEREBRAL CIRCULATIONMiddle Cerebral Artery StrokeMost common stroke syndrome. Symptoms:-contralateral weakness (face, arm, and hand more than legs)-contralateral sensory loss (face, arm, and hand more than legs)-visual field cut (damage to optic radiations)-aphasia: language disturbances (more likely with L. Hemi. Damage)-impaired spatial perception (more likely after R. Hemi. Damage) Insula
CEREBRAL CIRCULATION Anterior Cerebral Artery - Motor disturbance contralateral distal leg - urinary incontinence - speech disturbance (may be more of a motor problem) - apraxia of left arm (sympathetic apraxia) if anterior corpus callosum is affected - if bilateral may cause apathy, motor inertia, and mutenessPosterior Cerebral ArteryVisual disturbances:-contralateral homonymous hemianopsia (central vision is often spared)-L. Hemi: lesions alexia (with or without agraphia)-Bilateral lesions: cortical blindness : patients unaware they cannot see-Memory impairment if temporal lobe is affected Insula
CRANIAL NERVES Insula Posterior Communicating Artery
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