Unformatted text preview: of this model back
then allowed us to make predictions of the effect of brain damage. Classic Models of Language Processing!
Intra-Cranial Electrode Recordings! More recent evidence which supports
this modular theory of language. Study
of a patient who had electrode
recordings on the top of wernicke's
area, and they were able to predict
based on the EEG frequency wave
forms what the person heard. Nature Neuroscience, 13(11), 2010! Classic Models of Language Processing!
Arguments against the model!
1. Brain damage that is restricted to just one
area often has little lasting effect on language.! 2. Brain damage that does not include Broca’s
or Wernicke’s areas can sometimes cause
3. Broca’s and Wernicke’s aphasia rarely exists
in pure forms.!
4. Cognitive neuroscience has revealed a large
degree of individual variability in the localization
of language in the cortex.!
Ojemann, G., Ojemann, J., Lettich, E., & Berger, M. (2008). Cortical language localization in left, dominant
hemisphere: An electrical stimulation mapping investigation in 117 patients. Journal of Neurosurger, 108(2), 411-421.! A lot of good evidence that there are specialized regions of the brain. The problem with this model is that the predictions that seem straight forward based on the model tend not to work. The idea of
"this person has damage to the left infero frontal gyrus will develop Wernicke's aphasia" tends to not work, more than it tends to work." Which suggest these models are not as predictive as they
Some of the good arguments against this model include:
1) Brain damage restricted to just one area doesn't have long lasting effect on language -- so it doesn't do what it is suppose to do. People can have the damage exactly where Broca's or
Wernicke's area should be and not caused language impairments.
2) There can be brain damage that is very far off from Broca's or Wernicke's area, but still cause these aphasias
3)Broca's and Wernicke's aphasia usually occur as mix; it is rare as a pure form (like the clips shown suggest). Talked about double dissociations and how they are important, however more
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- Fall '11