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PSYC*1000 Psychology in Modules - Module 6 Summary Notes

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PSYC 1000
Benjamin Giguere

Module 6The Cerebral Cortex and Our Divided BrainOctober 13 2013The Cerebral CortexOlder brain networks sustain basic life functions and enable memory emotion and basic drivesNewer neural networks in the cerebrum hemisphere that contributes 85 of the brains weight from specialized work teams that enable perceiving thinking and speakingCerebral hemispheres come as a pair like the thalamus hippocampus and amygdalaThese hemispheres are covered by the cerebral cortexCerebral cortex intricate fabric of interconnected neural cells covering the cerebral hemispheres the bodys ultimate control and informationprocessing centerLarger cerebral cortex offers increased capacity for learning and thinking and therefore better capacity for adaptationStructure of the Cerebral CortexThe brains left and right hemispheres are filled with axons connecting the cortex to the brains other regionsThe cerebral cortex contains 2023 billion nerve cells and 300 trillion synaptic connectionsThese nerve cells are supported by glial cellsGlial cells cells in the nervous system that support nourish and protect neurons they may also play a role in learning and thinking provide nutrients and insulating myelin guide neural connectionsEach hemispheres cortex is subdivided into four lobes separated by fissures or foldsStarting at the front of the brain and moving over the top1Frontal Lobes behind forehead Portion of the cerebral cortex involved in speaking and muscle movements and in making plans and judgements2Parietal Lobes at the top and to the rear Receives sensory input for touch and body position3Occipital Lobes back of the head Includes areas that receive information from the visual fieldsReversing direction and moving forwards4Temporal lobes roughly above ears Includes the auditory areas each receiving information primarily from the opposite ear
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