tests of cerebral lateralization
DESCRIPTION
Tests of Cerebral lateralization. Lesions Sodium amytal test Dichotic listening test Functional brain imaging Split brain. Theories of Cerebral Asymmetry. Analytic-Synthetic theory Motor theory Linguistic theory. Broca’s Aphasia. Impaired language production - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: Tests of Cerebral lateralization](https://reader031.vdocument.in/reader031/viewer/2022012404/56813c35550346895da5b658/html5/thumbnails/1.jpg)
Tests of Cerebral lateralization
• Lesions
• Sodium amytal test
• Dichotic listening test
• Functional brain imaging
• Split brain
![Page 2: Tests of Cerebral lateralization](https://reader031.vdocument.in/reader031/viewer/2022012404/56813c35550346895da5b658/html5/thumbnails/2.jpg)
Theories of Cerebral Asymmetry
• Analytic-Synthetic theory
• Motor theory
• Linguistic theory
![Page 3: Tests of Cerebral lateralization](https://reader031.vdocument.in/reader031/viewer/2022012404/56813c35550346895da5b658/html5/thumbnails/3.jpg)
Broca’s Aphasia
• Impaired language production
• Overall language comprehension was not a problem UNLESS the meaning depended on prepositions, and other grammatical devices
• Some production difficulties– “To be or not to be”– Two bee oar knot two bee
![Page 4: Tests of Cerebral lateralization](https://reader031.vdocument.in/reader031/viewer/2022012404/56813c35550346895da5b658/html5/thumbnails/4.jpg)
Wernicke’s Aphasia
• Difficulties with nouns and verbs
• Trouble with language comprehension
• “Word Salad”
![Page 5: Tests of Cerebral lateralization](https://reader031.vdocument.in/reader031/viewer/2022012404/56813c35550346895da5b658/html5/thumbnails/5.jpg)
Summary
• Broca’s aphasia– More trouble with production of language– Problems with prepositions, conjuctions
and pronouns
• Wernicke’s aphasia– More trouble with comprehension– Problems remembering and knowing
nouns and verbs.
![Page 6: Tests of Cerebral lateralization](https://reader031.vdocument.in/reader031/viewer/2022012404/56813c35550346895da5b658/html5/thumbnails/6.jpg)
Conduction Aphasia
• Arcuate fasciculus
• Conveys information about the sounds of words, but not their meaning
• Poor repetition of unfamiliar words
![Page 7: Tests of Cerebral lateralization](https://reader031.vdocument.in/reader031/viewer/2022012404/56813c35550346895da5b658/html5/thumbnails/7.jpg)
Wernicke-Geschwind
• Conversation– Auditory signal to primary cortex– Primary cortex to Wernicke’s area– Wernicke’s area to Broca’s area (via
arcuate fasiculus)– Broca’s area to primary motor cortex– Primary motor cortex to vocalizaton
![Page 8: Tests of Cerebral lateralization](https://reader031.vdocument.in/reader031/viewer/2022012404/56813c35550346895da5b658/html5/thumbnails/8.jpg)
Wernicke-Geschwind
• Reading aloud– Primary visual cortex to left angular gyrus– Left angular gyrus to Wernicke’s area– Wernicke’s area to Broca’s area (via
arcuate fasiculus)– Broca’s area to primary motor cortex– Primary motor cortex to vocalizaton
![Page 9: Tests of Cerebral lateralization](https://reader031.vdocument.in/reader031/viewer/2022012404/56813c35550346895da5b658/html5/thumbnails/9.jpg)
Dyslexia
• Developmental dyslexia– Planum temporale
• Acquired dyslexia– Lexical procedure and phonetic procedure– Surface dyslexia– Deep dyslexia– Word-form spelling– Direct– Alexia