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Brain research

Brain research

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Brain research

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  1. Brain research Reading Pennington page 36-37 Gross pages 59-62

  2. Methods of investigating Brain Function • Mainly depend on: • Sticking in electrodes or • Cutting bits off and seeing what happens or • Sometimes by accidental injury

  3. Electrical stimulation of the brain • Delgado • Animal studies

  4. Electrical stimulation of the brain • Penfield • Human studies • Usually while undergoing existing surgery • Try it • (http://www.pbs.org/wgbh/aso/tryit/brain/)

  5. Cutting bits off • Animals: • Several experiments – ethical questions • Humans: • Pre-frontal lobotomy.

  6. Accidents • Phineas Gage

  7. Phineas Gage

  8. Electroencephalogram (EEG) Non – invasive but cumbersome. Crude method, not very accurate.

  9. Scanning methods • CAT scan • Computerised Axial Tomography • Produced by X-ray rotation

  10. CAT Scan

  11. Magnetic Resonance Imaging • MRI Scan • Magnetic field rotated around the head • Extremely detailed picture. • Recent technology has 3D images like the real thing.

  12. MRI scanning

  13. An fMRI of the brain. Green areas were active while subjects remembered information presented visually. Red areas were active while they remembered information presented aurally. Yellow areas were active for both types.

  14. MRI scan • Try it • (http://nobelprize.org/medicine/educational/mri/game/index.html)

  15. PET • Positron Emission Tomography

  16. PET Scans

  17. fMRI scans • Functional Magnetic resonance • Most powerful tool. Can give moving pictures of brain activity • Non Invasive

  18. Watching your brain work • Science Museum site link • (www.sciencemuseum.org.uk/exhibitions/brain/index.asp)