PSYC 336 Lecture 13: Chapter 13 Aphasia Notes - PSYC 336
Document Summary
1: laterization and localization (or not) of function for language, the wernicke-lichtheim-geschwind (wlg) model, evidence that casts doubt on the wlg model and several other ways to look at data, treatment options and recovery from aphasia. More likely, language processing co-opted existing structures and processes as needed. In vivo examinations of brain function: neuroimaging. Where fmri, pet, nirs blood flow. When erp, eeg, meg electrical and magnetic fields. Theories of brain-language relations: equipotentiality theory: intellectual abilities (including language) are the result of mass action across the brain, localizationist theory: specific bits do specific jobs. Lateralization is a part of this view. Lateralization: speech production and comprehension is left- lateralized (for the most part) Wada test: anaesthetize one side of the brain and see what happens. >95% of right-handers, ~70% of left- handers. Left-hemisphere damage is normally more disabling for language than right- hemisphere damage: lateralization doesn"t quite work: left vs. right brain.
