Definitions for functional magnetic resonance imaging
func·tional mag·netic res·o·nance imag·ing

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

WiktionaryRate this definition:0.0 / 0 votes

1. functional magnetic resonance imagingnoun

   A form of magnetic resonance imaging that records the flow of blood to areas of the brain when the patient is undertaking a specific neural activity

WikipediaRate this definition:0.0 / 0 votes

1. Functional magnetic resonance imaging

   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. functional magnetic resonance imaging

   Functional Magnetic Resonance Imaging (fMRI) is a non-invasive medical imaging technique that measures and maps 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, which is a type of signal that is closely related to neuronal activity. It allows researchers and medical professionals to study the brain's functional anatomy and examine the parts of the brain necessary to perform certain tasks.

WikidataRate this definition:0.0 / 0 votes

1. Functional magnetic resonance imaging

   Functional magnetic resonance imaging or functional MRI is an MRI procedure that measures brain activity by detecting associated changes in 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 contrast, discovered by Seiji Ogawa. 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 related to energy use by brain cells. Since the early 1990s, fMRI has come to dominate brain mapping research because it does not require people to undergo shots, surgery, or to ingest substances, or be exposed to radiation. Another method of obtaining contrast is arterial spin labeling. The procedure is similar to MRI but uses the change in magnetization between oxygen-rich and oxygen-poor blood as its basic measure. This measure is frequently corrupted by noise from various sources and hence statistical procedures are used to extract the underlying signal. The resulting brain activation can be presented graphically 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.

Matched Categories

1. • Magnetic Resonance Imaging

How to pronounce functional magnetic resonance imaging?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

   British

   Fred

   US English

   Tessa

   South African

How to say functional magnetic resonance imaging in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of functional magnetic resonance imaging in Chaldean Numerology is: 6

2. Pythagorean Numerology

   The numerical value of functional magnetic resonance imaging in Pythagorean Numerology is: 8

References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=functional magnetic resonance imaging
2. ^ Wiktionary
   https://en.wiktionary.org/wiki/Functional_Magnetic_Resonance_Imaging
3. ^ Wikipedia
   https://en.wikipedia.org/wiki/Functional_Magnetic_Resonance_Imaging
4. ^ ChatGPT
   https://chat.openai.com
5. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=functional magnetic resonance imaging