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Lecture

PSY100- Sept 29, 2011.docx

3 Pages
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Department
Psychology
Course Code
PSY100H1
Professor
Dan Dolderman

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PSY100 THE BRAIN Where are you? It is the physical and sociocultural environments surrounding you, which continually create and reinforce patterns in your brain - And within the brain, you arise because of the interconnectedness of many functioning subsystems. Just think of the profound changes that happen when you knock out a specific system Neurological – perceptual problems - Blindsight: you will have hole in vision field if someone takes out that specific system (eg. Central system- wont see centre- will see a hole) - damage to brain – cant see certain things, other parts of the brain can see it though (you process movement at higher level than basic physical location) - You can still see things that you cant physically see - Eg. Guessing shapes on a screen (Accurate most of time) - Signals go from eye to thalamus, then gets info from your eye and sends to back of your head and also amygdala which also gets some of the signals which is responsible for reading emotional expressions on faces, tone people were feeling (even though cant see) - eg. Anton-Babinski Syndrome: full cortical blindness but conscious denial of it and insistence that one can see normally Object Agnosia - Damage to “what” pathway - “Draw an apple” will be able to draw (asking to produce image from memory) - But if gave a picture of an apple, they would have no idea (cant produce from identification of memory) The Frontal Lobes - At different parts of time, 1903s and 40s- subserved “abstract attitude, foresights, and intellectual synthesis” - 40s-50s:lacks functional significance - Frontal lobes as the “final frontier” in neuropsychology - Considerable agreement in the literature of a functional frontal lobe dissociations between dorsal (cognitive, thinking functions of PFC) - top), ventral (affective* of PFC, towards bottom) - Way we actually think is because of interactions of both sides of PFC - If disconnected from feeling PFC, you would make better decisions (will think more rationally about things, using cognitive) - PFC goes top to bottom *** (not left to right) - Cognitive (dorsal) ; maintaining and shifting attention, mental flexibility, abstract thinking, feedback utilization, creativity, working memory, concentration etc - Affective (ventral); behaviour regulation, emotional decoding, processing emotions and reward, social inhibition (impulse controls), primary reinforcers (food, sex) - ^ Talk to each other a lot though (one actively the other very quickly, thinking and feeling while making decisions) – logic becomes led by emotional experiences - If trying to persuade someone, through rationality (usually), more insecure we are in the moment or etc, the more we tend to default to rational arguments (stats, figures), but what will really change someone’s mind is usually affective system not rational Orbitofrontal Cortex (in PFC) - If damage can lose functions associated with
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