Definitions for FMRI
fmri

Princeton's WordNetRate this definition:0.0 / 0 votes

1. functional magnetic resonance imaging, fMRInoun

   a form of magnetic resonance imaging of the brain that registers blood flow to functioning areas of the brain

WikipediaRate this definition:0.0 / 0 votes

1. fmri

   Functional magnetic resonance imaging or functional MRI (fMRI) 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.The primary form of fMRI uses the blood-oxygen-level dependent (BOLD) contrast, discovered by Seiji Ogawa in 1990. This is a type of specialized brain and body scan used to map neural activity in the brain or spinal cord of humans or other animals by imaging the change in blood flow (hemodynamic response) related to energy use by brain cells. Since the early 1990s, fMRI has come to dominate brain mapping research because it does not involve the use of injections, surgery, the ingestion of substances, or exposure to ionizing radiation. This measure is frequently corrupted by noise from various sources; hence, statistical procedures are used to extract the underlying signal. The resulting brain activation can be graphically represented by color-coding the strength of activation across the brain or the specific region studied. The technique can localize activity to within millimeters but, using standard techniques, no better than within a window of a few seconds. Other methods of obtaining contrast are arterial spin labeling and diffusion MRI. Diffusion MRI is similar to BOLD fMRI but provides contrast based on the magnitude of diffusion of water molecules in the brain. In addition to detecting BOLD responses from activity due to tasks or stimuli, fMRI can measure resting state, or negative-task state, which shows the subjects' baseline BOLD variance. Since about 1998 studies have shown the existence and properties of the default mode network, a functionally connected neural network of apparent resting brain states. fMRI is used in research, and to a lesser extent, in clinical work. It can complement other measures of brain physiology such as electroencephalography (EEG), and near-infrared spectroscopy (NIRS). Newer methods which improve both spatial and time resolution are being researched, and these largely use biomarkers other than the BOLD signal. Some companies have developed commercial products such as lie detectors based on fMRI techniques, but the research is not believed to be developed enough for widespread commercial use.

ChatGPTRate this definition:0.0 / 0 votes

1. fmri

   fMRI, or Functional Magnetic Resonance Imaging, is a neuroimaging technique used to measure and map brain activity by detecting changes in blood flow. Because the cerebral blood flow and neuronal activation are coupled, when an area of the brain is in use, blood flow to that region also increases. The primary form of fMRI uses the blood-oxygen-level-dependent (BOLD) contrast, which is a type of signal that is strongly related to the neurological activity in the brain. fMRI is often used in psychological and neurological research.

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1. FMRI

   What does FMRI stand for? -- Explore the various meanings for the FMRI acronym on the Abbreviations.com website.

Matched Categories

1. • Magnetic Resonance Imaging

Anagrams for FMRI »

1. firm

2. frim

3. FRIM

How to pronounce FMRI?

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How to say FMRI in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of FMRI in Chaldean Numerology is: 6

2. Pythagorean Numerology

   The numerical value of FMRI in Pythagorean Numerology is: 1

Examples of FMRI in a Sentence

1. Jenny Santi:

   For example, [it’s] through fMRI technology that we now know that there are two brain reward systems that are activated when we are giving or when we are volunteering-- these are exactly the same parts of the brain that light up when we think of food and sex.

2. Christopher Jones:

   This leaves open the possibility that, in a boring fMRI scanner they have nothing to do to keep them awake and thus fall asleep.

3. Matt Wall:

   E-cigarettes ... provide a very good simulation of traditional smoking (and) we have shown that using e-cigarettes with fMRI is an excellent paradigm for direct evaluation of the effects of smoking on human neurophysiology.

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References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=FMRI
2. ^ Wikipedia
   https://en.wikipedia.org/wiki/Fmri
3. ^ ChatGPT
   https://chat.openai.com