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Lecture 8

PSYA01H3 Lecture Notes - Lecture 8: Oliver Sacks, Prosopagnosia, Agnosia


Department
Psychology
Course Code
PSYA01H3
Professor
Steve Joordens
Lecture
8

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Lecture 8 & 9: The Brain! Part 1
-localization of function (discovering Broca’s area and it function for speech and language
production)
-cortex is the outside of the brain versus the midbrain which is the inside of the brain (primitive
part of the brain, which is common in many animals)
-Corpus callosum connects the left and right brain
-we differ from animals by having many cortex and cortex is wrinkled
-midbrain is the primitive part which is the reason for human instincts for danger, survival
-we have the largest brain to body ratio
-the cortex is wrinkled because it needs to fit in a smaller skull (evolution)
-we survived with our brain rather than through strength
-we don’t want our skull to be too big (women would die during childbirth)
-folds are standard from human to human
-parietal, temporal, and occipital are about interpreting external input from the world
-parietal is about body input
-temporal is about auditory input
-occipital is about visual input
-the frontal lobe is more about the output, acting on the world
-the h and the a in “cat in the hat” is the same, our brain’s primary cortex will see the a and h as
the same (raw input) but the association cortex uses past experiences and memories to
interpret, leading to recognition (very quick)
-the brain often uses right and left side of the brain
-however, the right side controls the left side, and vice versa
-left side of the brain and right side have different functions (lateralization)
-e.g. speech, using left hemisphere of the brain most of the time (esp. for right handed people)
-right brain is creative, left side is analytical (media)
-if you are strongly right handed, then you tend to be strongly lateralized, and if you are left
handed, then you are less lateralized, never reversed (e.g. speech is never only on the right
hemisphere)
-environment can change which hand you use often, but we are predestined to use a hand
more often
-claim that left handed people are more creative, might be because lateralization more mixed
-human beings are very visual, do things to just treat our vision and may find scenes that are
beautiful
-occipital lobe: the back of the brain, devoted to visual
-middle of the occipital lobe is where the signal from your eyes comes (light patterns, different
frequencies of light, contours and edges help define objects from each other)- mostly deals
with the primary cortex
-light lands on the retina of the eye, but if primary cortex is damaged, there would be a black
spot in world and the person can’t see
-however, people with a scitoma can still guess the general position of the object, despite being
unable to see
-agnosia is when people can’t know something by sight
find more resources at oneclass.com
find more resources at oneclass.com
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