Brain lateralization

- vision & sensory/motor systems- that why we learn pathways

- language- we’ll learn here

- Split Brains

Cerebral lateralization

Left Right

-serial - parallel

-language - faces/ patterns- emotional stuff- music- spatial ability

Language in the Brain

Learn about language?Lesion studies‘Tan’ - famous patient

Broca’s Aphasia- slow labored speech- not fluent - little/no language production- some sing/hum familiar tunes

- use nouns & verbs (essential meaning)- no conjuctions, prepositions, pronouns ( grammar)

The general commands the army.No ifs ands or buts.

Language in the Brain

Broca’s Aphasia

AgrammatismAnomiaArticulation

Language in the Brain

Wernicke’s Aphasia- receptive deficit

Pure word deafness - fail to recognize word (?)recognize emotion, source

Transcortical Sensory Aphasia- language loses meaning- can still repeat- damage - posterior language area

Conduction Aphasia- good comprehension, production- poor repetition- damage - arcuate fasciculus

Language in the Brain

Wernicke’s Aphasia- receptive deficit

Pure word deafness- fail to recognize word (?)recognize emotion, source

Transcortical Sensory Aphasia- language loses meaning- can still repeat- damage - posterior language area

Conduction Aphasia- good comprehension, production- poor repetition- damage - arcuate fasciculus

Aphasia Area Speech Comp Repet Naming

Wernicke’s STG fluent poor poor poor

Broca’s frontal nonfluent good poor? good

Conduction Arc. Fas. fluent good poor good

Transcortical Posterior fluent poor good poorSensory Language

This is really old!!!

Language in the Brain

Anomia revisitied- temporal lobe damage

- pole - proper nouns (people places things)

- inferior temporal- common nouns (categories)

Verbs- frontal- cerebellar

Pure Alexia

Language Development- receptive - productive- speech - written

Language in the Brain

Reading2 types- phonological (phonetic)

- sound it out- learning phase- slow

- graphemic ( whole word, lexical)- recognize word, irregular word

- Chi Chi Rodriguez- epinephrine

- fast, error prone if proofreading

Language in the Brain

Dyslexia- lots of different types

Developmental - won’t coverAquired dyslexias

Surface dyslexia - no whole-word reading

Phonological dyslexia - can not sound out

Word-form dyslexia (letter-by-letter)

Direct dyslexia (deep dyslexia)