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PSYC18H3 (274)
G Cupchik (49)

Chapter Six

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University of Toronto Scarborough
G Cupchik

Chapter SixPage 1 of 7Chapter Six Emotions and the BrainSleeping sicknessencephalitis lethargica o Started in Europe in the winter of 191617 o Lasted for ten years o A virus that attacked the striatal regions of the brain o People fell into a suspended state sitting motionless and speechless observing but doing nothing o A precursor of dopamine was discovered in 1969 that became the drug LDopaSome striatal system transmitter functions were restoredThey experienced awakenings and began to act spontaneously and schedule their daily activitiesIt gave rise to mood swings and emotionsViolent appetites and passions and certain obsessive ideasimagesLDopas effects may have occurred because the neural activity it caused in the damaged regions wasnt exactly the same as the activity of normal coordinated functions and as well as restoring partial function to the striatal region it sent nerve impulses to the limbic system where emotions arise How do brain mechanisms of emotion workNeuroimagingwidely used o A machine that monitors biochemical events in a series of conceptual slices through a persons brain while a computer takes this info and constructs visual images of the brain to show which regions have been metabolically most active o Noninvasive methodsd o Positron Emission Topography and functional Magnetic Resonance ImagingMovie pictures are constructed to show brain activity changing over time in the course of things like different emotional statesHindbrain o Includes regions that control basic physio processes o The medulla regulates cardiovascular activity o Pons control sleep o Cerebellum controls motor movementForebrain o Includes the thalamus which is involved in integrated sensory info o Hippocampusmemory processes o Hypothalamusregulates biological functionsfour fs o Limbic systemhas the cortex and structures involved in emotions like the amygdalaDescartes proposed that sensory stimuli pulled little strings that ran inside the sensory nerves to open valves which would let fluids from a central reservoir in the brain run down tubes to inflate muscles o Said it was the mechanism underlying the human reflexo Wrong because signals are electric and chemical o Emotions are more than reflexes
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