s-13 - Left hemisphere specializations The left hemisphere...

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Left hemisphere specializations The left hemisphere of the brain is largely specialized for: temporal order perception, calculation analysis language localizing language to the left hemisphere for most people Autopsy of aphasic brains indicates site of lesion (injury) is LH Aphasics have right visual field and right motor impairments Epileptics with surgically separated hemispheres have no language for left side experience (right hemisphere is a languageless but independent brain). Brain imaging shows lesions in LH for aphasics Sign language aphasics show same symptoms as hearing aphasics Aphasia Impairment of language, affecting the production and/or comprehension of speech and/or the ability to read or write Aphasia is always due to injury to the brain – most commonly from a stroke Stroke Occurs when a blood clot blocks a blood vessel or artery (ischemic, 80 When a ‘brain attack’ (= stroke) occurs, it kills brain cells in the immediate area. %), or when a blood vessel breaks (hemorrhagic, 20%), interrupting blood flow to an area
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s-13 - Left hemisphere specializations The left hemisphere...

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