Wikipedia. Functional magnetic resonance imaging or functional MRI (fMRI) measures brain activity by detecting changes associated with blood flow .[1][2] This technique relies on the fact that cerebral blood flow and neuronal activation are coupled.
How do fMRI scans work psychology?
Copyright: FMRIB Centre Functional magnetic resonance imaging, or FMRI, works by detecting the changes in blood oxygenation and flow that occur in response to neural activity – when a brain area is more active it consumes more oxygen and to meet this increased demand blood flow increases to the active area.
What is an fMRI used for in psychology?
Functional magnetic resonance imaging, or fMRI, is a technique for measuring brain activity . ... fMRI can be used to produce activation maps showing which parts of the brain are involved in a particular mental process.
What is fMRI IB psychology?
fMRI – Functional Magnetic Resonance Imaging . Technology that measures brain activity by detecting associated changes in concentration of oxygen in the blood.
What can be studied using fMRI?
We know fMRI measures blood flow and not neural activity directly. And the assumption (that’s been validated in studies) is that blood flow correlates with neural activity. The blood flow can reveal changes in brain areas as small as a millimeter cubed.
What are the advantages and disadvantages of fMRI?
The big advantage of fMRI is that it doesn’t use radiation like X-rays , computed tomography (CT) and positron emission tomography (PET) scans. If done correctly, fMRI has virtually no risks. It can evaluate brain function safely, noninvasively and effectively.
How does fMRI affect behavior?
Participants’ behavior during task performance in an fMRI scanner can then be correlated to the brain activity using the blood-oxygen-level-dependent signal . ... Thus, in many cases these errors can be used themselves to then correlate brain activity to them.
What are the disadvantages of an fMRI?
- It is expensive compared to other scans.
- The patient has to stay still to capture clear images.
- Patient’s movements can affect the quality of images.
What is an fMRI used to diagnose?
It may be used to examine the brain’s functional anatomy, (determine which parts of the brain are handling critical functions), evaluate the effects of stroke or other disease, or to guide brain treatment. fMRI may detect abnormalities within the brain that cannot be found with other imaging techniques.
Is fMRI the same as MRI?
What’s the Difference Between MRI and FMRI? FMRI scans use the same basic principles of atomic physics as MRI scans , but MRI scans image anatomical structure whereas FMRI image metabolic function. Thus, the images generated by MRI scans are like three dimensional pictures of anatomic structure.
How do you answer SAQ psychology?
- Restate the question. ...
- State the study (or studies) that will be used in the answer. ...
- Define the key term (or terms) in the topic. ...
- Explain the topic. ...
- Summarize the supporting study. ...
- Explain what the results of the study say about the topic. ...
- Conclusion (optional)
How is fMRI used to study the brain?
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.
What other strategies do psychologists use in studying the brain?
These technological methods include the encephalogram (EEG), magnetic resonance imaging (MRI), functional magnetic resonance imaging (fMRI) and positron emission tomography (PET) . These techniques ultimately have the same goal in that they aim to produce coherent representations of the brain.
What questions can fMRI answer about the brain?
- Question 1: Which (if any) functions can be localized to specific brain regions?
- Question 2: Can markers of mental process X be found during task Y?
- Question 3: How distinct are the representations of different stimuli or tasks?
- Question 4: Do two tasks X and Y engage common or distinct processing mechanisms?
Is fMRI valid?
Although reliability and validity reports for fMRI are generally quite favorable, significant variability was found across studies with respect to methodology, preventing in some cases either the assessment of the reliability of individual datasets, or cross-study comparisons.
What happens during an fMRI scan?
Functional MRI (fMRI) scans monitor brain activity by detecting changes in blood flow in the brain. WHAT HAPPENS DURING AN FMRI SCAN? During an fMRI scan you lie on a bed, which slides into the hole in the scanner . The scanner is controlled by a technician in a different room.
