PS263 Chapter Notes - Chapter 5: Heart Rate, Membrane Potential, Electrophysiology

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Contrast x-ray techniques: involve injecting into one compartment of the body a substance that absorbs x rays either less than or more than the surrounding tissue. These are good for visualizing the brain. cerebral angiography: a contrast x ray technique uses the infusion of a radio- opaque dye into a cerebral artery to visualize the cerebral circulatory system during. These are most useful for localizing vascular damage and also can locate tumors. Computed tomography (ct): developed in the early 1970s, revolutionized the study of the brain. Takes numerous x rays of an individual s head, produces a 3d image of the brain. Magnetic resonance imaging (mri): a procedure in which high resolution images are constructed from the measurement of waves that hydrogen atoms emit when they are activated by radio-frequency waves in a magnetic field. It provides high spatial resolution (the ability to detect and represent differences in spatial location); mri can produce images in three dimensions.

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