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Created with Fabric.js 1.4.5 Ways to Measure Brain Fuction By: Sarah Kmiecik EEGs PETs MRI / fMRI An EEG (electroencephalogram) is an amplified readout of the electrical waves in your brain. It measures brain activity. The output usually looks like a set of squiggles. There are differentwaves based on what state your brain is in, shown below: A PET scan is a scan that measures how much glucose different sections of the brain take in. When someone is given radioactive glucose, the scan can track the gamma rays that are released. It shows hot spots as yellow and red, and less active areas as blues and greens.This helped us to see that different parts of the brain are more active when we do different things. For example, a different part of the brain would become more active if you were doing a math problem instead of looking at a picture. This PET scan shows the affects of Alzheimer's. The brain activity goes down significantly in the later stages, causing the symptoms we all know. An MRI (magnetic resonance image) makes a picture of the structure of the brain by puttingbrain molecules in a strong magnetic field, making them spin. They then disorient the molecules and let them return to their normal spinning. These can show anatomical problems with the brain. An fMRI shows the structure of the brain as well as activity.It measures activity by watching where oxygen-rich blood flows to, and that shows up as spots of color on the scan.
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