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lateralization of function

lateralization of function. function or behavior found in only one cerebral hemisphere why might there be lateralization? what are its advantages and disadvantages?. left hemisphere analytical abilities quantitative skills language. right hemisphere music spatial abilities

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lateralization of function

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  1. lateralization of function • function or behavior found in only one cerebral hemisphere • why might there be lateralization? • what are its advantages and disadvantages?

  2. left hemisphere analytical abilities quantitative skills language right hemisphere music spatial abilities artistic abilities emotions facial recognition lateralized behaviors

  3. Language • most well studied lateralized behavior • 95% of right handed have speech on left • 70% of left handed have speech on left aphasia – language deficit that cannot be attributed to motor, motivational, sensory or other explanations

  4. Broca’s Aphasia • characterized by broken halted speech, absence of prosody • comprehension – fairly good; ability to read – fairly good

  5. Wernicke’s aphasia • fluid aphasia, deficits appear to be in comprehension; words are nonsensical • comprehension – poor • reading ability - poor

  6. Wada test • injection of sodium amytal or sodium amobarbital – anesthetic • used to determine hemisphere important for speech

  7. Another way to study lateralized behaviors is via “split brain” patients • split brain surgery

  8. consequences of “split brain” • initially – • “Breakdown of the Bicameral Mind” • Julian Jaynes • subsequently – only can really tell by experimental manipulations in the lab

  9. Emotions • emotional facial expressions • evolutionary explanation

  10. Emotions • emotional facial expressions • evolutionary explanation • role of right hemisphere • recognition of emotion • display of emotions • chimera • brain damaged humans

  11. brain regions involved in emotion • limbic system- • components of limbic system- includes hypothalamus, hippocampus, amygdala, olfactory bulbs, septum • sits within the temporal lobe • temporal lobe epilepsy

  12. Kluver Bucy Syndrome • Kluver Bucy syndrome • associated with temporal lobe damage characteristics:

  13. Kluver Bucy Syndrome • Kluver Bucy syndrome • associated with temporal lobe damage characteristics:1. extraordinary tameness

  14. Kluver Bucy Syndrome • Kluver Bucy syndrome • associated with temporal lobe damage characteristics:1. extraordinary tameness 2. lack of fear

  15. Kluver Bucy Syndrome • Kluver Bucy syndrome • associated with temporal lobe damage characteristics:1. extraordinary tameness 2. lack of fear 3. put anything in the mouth

  16. Kluver Bucy Syndrome • Kluver Bucy syndrome • associated with temporal lobe damage characteristics:1. extraordinary tameness 2. lack of fear 3. put anything in the mouth 4. mount anything

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