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18 Cards in this Set
- Front
- Back
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Cerebral Lateralization Definition
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Localization of function attributed to either the right or left side of the brain
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Aphasia
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deficit in language comprehension or production due to brain damage, usually on the left side
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Broca's Area
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left interior prefrontal
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Apraxia
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difficulty performing movements when asked to do so out of context, also a consequence of damage on the left
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differences in female brains
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females may use both hemisphere more often for language task than males do
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differences in male brains
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males are more lateralized .
- males with unilateral lesion in LH more likely to have aphasia than... males with unilateral lesions in RH |
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left hemisphere is speech dominant in
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- almost all dextrals - right handers
- most sinistrals - left handers |
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Sinestrals
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( left handers ) were about 30% and 34% respecitvely
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Dextrals
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right handers with left - hemisphere diagnosed as aphasic 60% and 2%
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functional brain imaging
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fMRI or PET scan used to se which half is active when doing a language test
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dichotic listening
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report more digits heard by the dominant half
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Sodium Amytal Test
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anesthetize one and check for language function
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Dominant hemisphere
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one hemisphere is more ddominant or more in control (left hemisphere ) ( assumes the dominant role in the control of all complex behavioral and congnitve process
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Minor Hemisphere
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right hemisphere
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Apraxia
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difficulty performing movements when asked to do so out of context, also a consequence of damage on the left hemisphere
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Broca's Area
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left interior prefrontal cortex damage leads to expressive aphasia
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Aphasia
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deficit in language comprehension or production due to brain damage, usually on the left
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Corpus Callosum
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- largest cerebral commisure
- transfers learned info from one hemisphere to the other - when cut , each hemisphere functions independently - studing split- brain and optic chiasm so that cisual info can't cross to cotralateral hemisphere |
