In a typical fMRI study, researchers compare conditions to identify ...

In a typical fMRI study, researchers compare conditions to identify ...

• A. Structural differences
• B. Functional activation differences
• C. Genetic influences
• D. Neurotransmitter concentrations

Answer: (B)

The main idea here is using fMRI to detect how brain activity changes between different conditions by measuring functional activation. By comparing two or more conditions, researchers look for regions that show greater (or lesser) BOLD signal in one condition, indicating that those areas are more active during that task or stimulus. This reveals functional activation differences rather than static brain structure or chemical properties. Structural differences would require anatomical MRI and are about brain shape and size, not task-related activity. Genetic influences would come from genetic analyses, not imaging of brain activity. Neurotransmitter concentrations are measured with methods like PET or MR spectroscopy, which assess chemistry rather than the hemodynamic responses that fMRI tracks.

The main idea here is using fMRI to detect how brain activity changes between different conditions by measuring functional activation. By comparing two or more conditions, researchers look for regions that show greater (or lesser) BOLD signal in one condition, indicating that those areas are more active during that task or stimulus. This reveals functional activation differences rather than static brain structure or chemical properties. Structural differences would require anatomical MRI and are about brain shape and size, not task-related activity. Genetic influences would come from genetic analyses, not imaging of brain activity. Neurotransmitter concentrations are measured with methods like PET or MR spectroscopy, which assess chemistry rather than the hemodynamic responses that fMRI tracks.