Emotion Lecture 8 2010 Emotion and The Brain

Emotion Lecture 8 2010 Emotion and The Brain - Emotion and...

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Emotion and The Brain Psychology of Emotion Lecture 8 Professor David Pizarro 1 Wednesday, February 17, 2010
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Exam Wednesday, Feb. 24 Will cover Lectures 1-9 Chapters 1, 2, 4, 5, 6, 7, 8,12 20 points Multiple Choice, 40 points short answer (3 pages) Equal parts book/lecture (with slight emphasis on overlap) Use ofFce hours! 2 Wednesday, February 17, 2010
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Why care about the brain? We’re interested in emotions. There are easier ways to measure emotions than looking into the brain. So why bother? Neuroscience for the sake of neuroscience. (e.g, fnding the neural underpinnings oF emotions). Perhaps lead to intervention at the biological level? But in some cases, brain research can really inForm psychological hypotheses. 3 Wednesday, February 17, 2010
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Ways to study emotion in the brain Animal Models Lesion Studies (human OR animals) Brain Imaging (fMRI, CAT, PET, etc.) 4 Wednesday, February 17, 2010
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Lesion Studies Animals Lesions in animals are fairly easy (although clearly invasive). Can be localized using a variety of methods (in places that would rarely occur in human patients) But perhaps there are important interspecies differences we don’t know about? Humans We can Fnd people with brain damage in speciFc structures (a bit of “luck of the draw”). BUT. We can’t lesion them ourselves. Can never be sure that deFcits are not due to something else. 5 Wednesday, February 17, 2010
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Lesions--alternative Trans-Cranial Magnetic Stimulation (TMS) Involves creating a strong focal magnetic Feld over the scalp of a (healthy) subject Creates a disturbance of activity near the probe, which goes away when the probe is turned off! Pros: Reversible, repeatable and (relatively) non-invasive Cons: Not clear what it’s doing or exactly where the ‘disruption’ is 6 Wednesday, February 17, 2010
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The “God Helmet” (Dr. Persinger) 7 Wednesday, February 17, 2010
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Brain Imaging Computerized Axial Tomography (CAT/CT) Basically just X-ray, rarely used now Positron Emission Topography (PET) Inject with radioactive isotope and measure where it goes Electro-encephalography (EEG) Measure the local electrical activity with scalp electrodes 8 Wednesday, February 17, 2010
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EEG 9 Wednesday, February 17, 2010
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Brain Imaging (cont’d) (Functional) Magnetic Resonance Imaging (fMRI) Measures the amount of oxygenated blood in an area (metabolic activation indicates “activity”). Pros: Non-invasive and can repeat measures for a subject Good spatial resolution (measure activity in voxels of ~1mm3) Cons: Not great temporal resolution (signal lags around 6 secs behind activity) Indirect measure of activity, so not totally certain what it represents 10 Wednesday, February 17, 2010
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What research has to say about emotion and the brain
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Emotion Lecture 8 2010 Emotion and The Brain - Emotion and...

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