Current fMRI techniques can localize brain activity, graphically display patterns of brain activation, and determine their intensity by color-coding the strength of activation.
Dr. Davidson said it was not clear what factors accounted for the differences in brain activation and immune response, but genetic and environmental influences might play a role.
Relationships between brain activation and clinical symptoms were also examined.
No significant results were observed in the whole brain analyses between brain activation and verbal intelligence.
We hypothesized that brain activation relating to such cues would be different between patients with COPD and healthy control subjects, reflecting greater engagement of emotional mechanisms in patients.
However, in a conventional analysis by statistical parametric mapping (SPM) method, the MHR is assumed to be a fixed-response function, which may bias the conclusions about brain activation, such as the shapes of the response curve or the different response delays to stimuli.
Until now it is unclear if subliminally presented pedophilic stimuli elicit similar brain activation such as the above described supraliminally presented stimuli.
The primary use of task-evoked fMRI is to identify the correlation between brain activation pattern and brain functions, such as perception, language, memory, emotion and thought [100, 101].
Such age-related changes include reductions in processing speed, working memory and peripheral nervous system functions, which may be associated with changes in brain volume, white matter integrity, regional brain activation patterns and cellular function (Park and Reuter-Lorenz, 2009).
Different patterns of brain activation may correspond to such dissociations between performances: e.g., Damasio et al. (1996) found that retrieval of names of animals and of tools activate different regions in the left temporal lobe.
