brain1.W09 - Atoms spin which creates a magnetic field Pass...

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Brain parts: and how do we know what they do? Turn-ons, turn-offs, and peep shows
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Turn-offs Aspiration Electrical destruction (ablation) Surgical lesion Chemical lesion and neurotoxins Accidents, tumors, stroke, etc.
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Turn-ons Electrical stimulation Chemical stimulation
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Peep shows 1. Electroencephalograph (EEG) 2. Computerized Transaxial Tomography (CAT scan) 3. Positron Emission Tomography (PET scan) 4. Magnetic resonance imaging (MRI)
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1. EEG
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2. CAT scan
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3. PET scan It’s the scanner again. Introduce radioactive glucose Glucose is metabolized by the brain Active areas use more glucose than less active areas
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4. MRI and fMRI Magnetic resonance imaging
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Unformatted text preview: Atoms spin which creates a magnetic field Pass radio waves through the magnetic field > resonance resonance changes with blood flow and oxygen consumption MRI and fMRI MRI vs. PET scan MRI has greater spatial and temporal resolution MRI does not require introduction of radioactive substances A CHICKEN & EGG PROBLEM • A study finds that Group A and Group B show different fMRI patterns. • Do differences in brain cause Group A and B to be different? • Or do the different experiences of A and B result in different brain patterns? BRAIN DIFFS GROUP DIFFS GROUP DIFFS BRAIN DIFFS ?...
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  • Spring '09
  • CLARK
  • Positron emission tomography, Magnetic resonance imaging, Medical imaging, DIFFS BRAIN DIFFS, DIFFS GROUP DIFFS

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brain1.W09 - Atoms spin which creates a magnetic field Pass...

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