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?
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