PSYB65H3 Lecture Notes - Lecture 9: Generalised Tonic-Clonic Seizure, Dichotic Listening Test, Temporal Lobe

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Published on 17 Apr 2013
Lecture 9
Right brain and left brain different functioning
Observations during periods of warwounds to the head,
noticed patients responded differently if the wound was on
the left or right
Damage to left hemisphere in ADULTS
o 100% patients show some aphasia symptoms(problems
in language)
o approx 30% show recovery these are left
o least amount of recovery in right handed individuals
o right handed individuals had most problem with left
hemisphere damage because language is in the left
hand side, and no recovery
o left handed/ambidextrous and lose language can still
recover and relearn
Damage to right hemisphere in ADULTS
o Most patients shows few aphasic problems, rarely leads
to full aphasia
o Those who do show aphasic problems left
o Right handed individuals only time they have a problem
is damage in left hemisphere
o Very good recovery from damage, suggesting left
handed people have language on both sides
Hemisphere damage in Children (under 5)
o Damage to either hemisphere has equal probability of
effecting language (aphasic symptoms)
o Suggests that language on both sides for children ,
childs brain is not yet fully lateralized
lateralization happens more in right handed
o Recovery: 100% children with brain damage show
Acollossul (people born without corpus collusom)
o Children with early extensive brain damage language
will always be on the opposite side, as we mature it
becomes more localized to the left
o Right handers: Left hemisphere better at language
o Language doesn’t shift over if you don’t have corpus
collosum because there is no connection
o Left handed people don’t show this lateralization left
handed individuals small brain damage? Genetic?
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