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Studying the Brain - Coggle Diagram
Studying the Brain
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Brain Mapping
Doctors studied Gage’s case for many years, but they did not preserve his brain when he died.
Then, in 1914, when World War I began, large numbers of soldiers suffered brain injuries,
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With this information, doctors were able to begin creating maps of brain regions and their functions
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“Seeing” Brain Activity
In the 1920s, a German scientist named Hans Berger created a machine that could measure the electrical activity in the brain.
This machine, called an electroencephalogram (il-LEK-troh-en-SEH-fuh-loh-GRAM) (EEG) machine, provided a partial solution.
Everything you do—running, singing, thinking, and more—begins with tiny electrical signals in your brain.
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. Observing activity deeper in the brain was difficult and potentially dangerous until a test called an fMRI became available in the 1990s.
Unlike an EEG, which measures electrical activity, an fMRI identifies and maps active brain regions by measuring blood flow
Since blood is your body’s oxygen delivery system, brain areas with more blood flow generally have more electrically active neurons, and unlike electrical signals
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An fMRI allows scientists to detect the precise brain regions used when you sing, laugh, or watch a scary movie
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The ability to detect brain signals raised another question: is it possible to decode these signals?