Transcription: This video gives you a three-dimensional representation of a person's brain. Actually this brain was imaged while it was inside a living person. Like the heart video that you saw in module 14, this video was made by injecting the person with a small amount of a radioactive substance. That substance traveled throughout the bloodstream emitting gamma rays. For this video, gamma ray detectors were placed around the person's head and the data from those detectors allowed us to make this Videos like this are useful because they tell us where blood is going in the brain. Anywhere you see yellow or w ...
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