BLOA Brain imaging technologies
7 important questions on BLOA Brain imaging technologies
Brain Imaging Technologies: (showing structure or activity?)
- electroencephalogram (EEG) - activity
- computer tomography (CT) - structure
- magnetic resonance imaging (MRI) - structure
- functional magnetic resonance imaging (fMRI) - both
- positron emission tomography (PET) - activity
What is the main difference between an MRI scan and the other two types of scan described?
The image produced by an MRI shows brain structure, not activity.
Explanation:
Both the fMRI and the PET scan show brain activity. The fMRI also shows the brain structure.
Why might a doctor use a PET scan rather than either of the others?
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What is an fMRI scan often used for?
Assessing the effects of stroke, trauma or degenerative disease.
Explanation:
The fMRI is a very precise scan that is useful for assessing damage in the brain by measuring a decrease or change in activity in certain regions.
The nature of the relationship between neurochemical activity within the brain (as shown by brain imaging technology) and behaviour is:
A correlation - changes in each may be seen at the same time.
Explanation:
Brain imaging technologies, when used to study neurochemical functioning, cannot definitely show cause and effect, though inferences may be drawn. They can only help establish a correlation them. Structural brain damage however can be used to establish cause- effect relationships.
Which of these is not a limitation of brain imaging technologies in investigating the relationship between biological factors and behaviour: ecological validity, expense, time, interpretation
Which principle of the biological level of analysis links most closely to the use of brain imaging technologies?
The question on the page originate from the summary of the following study material:
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