fmri
Học thuậtThân thiện
Definition
Noun: A neuroimaging technique that measures and maps brain activity by detecting changes in blood flow. It is a specialized application of magnetic resonance imaging (MRI) that shows which areas of the brain are more active by identifying regions with increased blood oxygenation.
Usage
- As a subject: "fMRI has revolutionized cognitive neuroscience."
- As an object: "The researchers used fMRI to study decision-making."
- With modifiers: "Functional MRI (fMRI) scans provide detailed maps of brain activity."
Examples
- The study employed fMRI to observe neural responses to visual stimuli.
- fMRI data revealed increased activity in the prefrontal cortex during the task.
- Advances in fMRI technology allow for more precise localization of brain functions.
Advanced Usage
- "Resting-state fMRI": A method measuring spontaneous brain activity while a subject is not performing a specific task.
- Resting-state fMRI is used to study the brain's functional connectivity networks.
- "fMRI signal" or "BOLD signal": Refers to the Blood-Oxygen-Level-Dependent contrast, which is the physiological basis of the fMRI measurement.
- The fMRI signal is an indirect measure of neuronal activity.
Variants and Related Words
- Functional Magnetic Resonance Imaging: The full, formal name for fMRI.
- MRI (Magnetic Resonance Imaging): The broader imaging technique upon which fMRI is based, primarily used for anatomical structure.
- Neuroimaging: The general field of techniques for imaging the brain's structure or function.
Synonyms
- Brain activity mapping
- Functional neuroimaging (a broader category that includes fMRI)
Related Phrases
- "Undergo an fMRI scan": To be the subject in an fMRI procedure.
- Participants were asked to undergo an fMRI scan.
- "fMRI findings": The results or data obtained from an fMRI study.
- The fMRI findings supported the hypothesis.
Noun
- a form of magnetic resonance imaging of the brain that registers blood flow to functioning areas of the brain