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Unformatted text preview: 9/12/2008 1 Psychology 2: Introduction to Psychology Day 7 topics Examining brain structure Functional: electrical activity Functional: blood flow Neuropsychology Why examine brain structure/function? Its interesting! Most complex system Clinical/diagnostic purposes Detect neurological diseases Prevent/predict onset in at- risk populations How can we study the brain? Brain volume, integrity CT scans, MRI scans Electrical activity Single cell recordings, EEG, ECoG Changes in blood flow PET scan, fMRI scan Brain injury, behavior Neuropsychology, TMS Assessing structure: CT scans 3-D x-ray of the brain Absorption rate varies across brain substances: Fluid (CSF) Skull/bones Gray matter (cell bodies) White matter (axons) + Fast, very useful medically- Cannot see brain anatomy as good as we would like Assessing structure: MRI scans Incredible magnetic field!- 3T magnet vs. Earths field- One field aligns H atoms- Another bumps them out of alignment- Measure time it take for atoms to get back to alignment + Better visibility of the brain, safe- Costly, medical issues with patient Quality control: CT vs. MRI 9/12/2008...
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- Spring '04