Aug 26 Neuroscience

Behavioral approach gais et al 2006 learned english

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Unformatted text preview: 2006) Learned English-German vocabulary pairs Sleep group vs. Awake group Conclusion: Going to sleep shortly after learning improves memory consolidation Memory Consolidation Research question: What processes in the brain are involved during consolidation? Physiological approach (Gais et al., 2007) Measured brain activity using fMRI at learning and at recall. Results: during delayed recall, _____________________ for sleep group than awake group. Neurons Cells specialized to receive and transmit information in the nervous system How neurons communicate? How neurons process information? 3 Cognitive Neuroscience Brain Structure Frontal- motor movement, higher level complex cognitive processes, ability to produce language, coordination, alzheimers Parietal- senses, pain, pressure, temp Occipital- vision Temporal- hearing, recognizing faces, hippocampus(memory) *localization of function Localization of Function Neurons serving different cognitive functions transmit signals to different areas of the brain Cognitive functioning breaks down in specific ways when areas of the brain are damaged Neuropsychological case studies Damage to fusiform face area (FFA) within temporal lobe… Causes prosopagnosia (inability to recognize faces) Damage to Broca’s area in frontal lobe … Causes problems in producing language 4 Cognitive Neuroscience Brain Imaging Measure blood flow, which increases in areas of the brain active during a cognitive task Uses the subtraction technique Positron emission tomography (PET) Illustrates higher concentration of radioactive chemical in the most active brain areas Functional Magnetic Resonance Imaging (fMRI) Illustrates higher concentration of oxygen by detecting changes in the magnetic response of the hemoglobin in the most active brain areas Gais et al. (2007): 5 Cognitive Neuroscience Event-related potential (ERP) Scalp electrodes record electrical activity Conclusions Distributed processing: Specific functions are processed by many different areas of the brain Behavioral and physiological approaches answer different questions about cognition, but both are important. 6...
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This note was uploaded on 03/01/2012 for the course EXP 3604 taught by Professor Fasig during the Fall '08 term at University of Florida.

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