| |
| | eMedicine - Aphasia : Article by Daniel H Jacobs, MD (Site not responding. Last check: 2007-10-24) |
 | | In Wernicke aphasia, neighborhood signs include a superior quadrantanopsia due to involvement of optic radiations, limb apraxia due to involvement of the inferior parietal lobule or its connections to the premotor cortices, finger agnosia, acalculia, or alexia with agraphia (components of the Gerstmann syndrome) due to involvement of the angular gyrus. |
 | | Global aphasia commonly affects patients with large infarcts of the left cerebral hemisphere, typically involving the occlusion of the internal carotid or middle cerebral artery and resulting in a large, wedge-shaped wipeout of two thirds or more of the left hemisphere. |
 | | Aphasia is diagnosed on the basis of localization (involvement of the left hemisphere or thalamus); therefore, careful, thorough mental-state examination is essential. |
| www.emedicine.com /neuro/topic437.htm (5694 words) |
|