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add fMRI to glossary.md #1387

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13 changes: 13 additions & 0 deletions docs/glossary.md
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Expand Up @@ -25,6 +25,19 @@ Each record consists of the same number of fields, and these are separated by co

- [wikipedia](https://en.wikipedia.org/wiki/Comma-separated_values)

#### fMRI

**fMRI** stands for *functional Magnetic Resonance Imaging*.

It measures brain activity by detecting changes associated with blood flow. This technique relies on the
fact that cerebral blood flow and neuronal activation are coupled. When an area of the brain is in use, blood flow
to that region also increases. An fMRI is based on the same technology as [magnetic resonance imaging (MRI)](#mri).

##### References

- [wikipedia](https://en.wikipedia.org/wiki/Functional_magnetic_resonance_imaging)
- [PsychCentral](https://psychcentral.com/lib/what-is-functional-magnetic-resonance-imaging-fmri)

#### FWHM

**FWHM** stands for *Full Width at Half Maximum*.
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