PSYC 2560 Lecture 10: Language Lateralization
1 Apr 2016
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It was once proposed that language existed entirely in the left hemisphere. Roger sperry won the nobel prize alongside hubel and wiesel for his split brain surgery. Compensatory strategies: speaking aloud (left hemisphere speaks aloud to convey message to right hemisphere) Split brain individuals have difficulty with word association tasks. Split brain individuals may confabulate similar to those with korsakoff"s syndrome. Alexithymia: lack of words for emotions (individuals have difficulty explaining emotions) Overlearned behaviours that require bi-motor coordination are not hindered if they were learned before surgery. An etch-a-sketch would be impossible for a split brain individual to use due to the requirement of coordination from both sides of body. These theories are ambiguous and very pop psychology based. Analytic-synthetic theory: the right hemisphere is more synthetic (creative), whereas the left hemisphere is very analytical (deductive, critical, philosophizing). Motor theory: speech is a fine motor movement in the left hemisphere. We are left hemisphere dominant for motor control.
