Psychology 2220A/B Chapter Notes - Chapter 5: Transcranial Magnetic Stimulation, Magnetic Resonance Imaging, Diffusion Mri

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Part 1: methods of studying the nervous system. Methods of visualizing and stimulating the living human brain. X-rays = useless: method: x-ray beam is shot through a structure of object (say the head) and then onto a photographic plate. When the ray is going through, it leaves radiation of the structures and different structures can be seen by how much each absorbs. B/c the brain is very similar in its different areas, little to nothing can be distinguished. Contrast x-rays: injecting into one compartment of the body an x-ray substance that is absorb either less or more than the surrounding tissue. This heightens the contrast b/w the compartment and surrounding tissue = provides a more detailed image, especially in the vasculature: cerebral angiography: uses this technique to visualize the cerebral circulatory system. Good for looking to see if there is damage, or if a tumor is growing (displacement of vessels)

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