Lateralization of Language ch.16 (cont’d) and Biopsychology of Memory ch. 11. Lateralization and Cortical Localization of Language. Ch. 16 (cont’d). Outline. Differences Between the Left and Right Hemispheres Broca’s Area Wernicke’s Area. Differences Between The Left and Right Hemispheres.
Ch. 16 (cont’d)
Arcuate fasciculus (unique to humans; long segment; medial)
and other network(anterior segmentand posterior segment)
(2) Areas of brain involved in language are not solely dedicated to language; many of the constituent cognitive processes also play roles in other behavior
Example - some areas involved in short-term memory and visual pattern recognition are involved in reading, too
(3) W-G model assumes that brain areas involved in language are large, circumscribed, and homogenous but Cognitive Neuroscience assumes they are small, widely distributed, and specialized
(1) Differences between brains of dyslexic and non-dyslexic readers have been reported, however none seems to play a critical role
Example - dyslexics do not display the asymmetry of the planum temporale
(2) Several types of dylexias and thus likely to have different causes and brain areas susceptible
(3) Difficult to determine cause-and-effect of brain abnormalities
Are these abnormalities the cause of dylexia or the result of lack of reading experience (brain develops differently as a result of different experience)?
Example: can pronoun words consistent with rules ( fish, river, or glass) but can’t pronounce unusual words (have, lose, and steak are like cave, hose, and beak)
Example: can say phonetically unusual words like aisle and yacht but cannot pronounce rule-consistent words like fish, river, or glass
“Why do we have 2 memory systems… one conscious, and the other unconscious?”