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Differences in measured brain activity can be represented in a number of ways.
Most simply, they can be presented as a table, displaying co-ordinates that show the most significant differences in activity between tasks. However, differences in brain activity are more often shown as patches of colour on an MRI brain 'slice', with the colours representing the ___location of voxels that have shown statistically significant differences between conditions. The gradient of color is mapped to statistical values, such as t-values or z-scores. This creates an intuitive and visually appealing means of delineating the relative statistical strength of a given area of activation. Recently, an [http://homepages.uni-tuebingen.de/matthias.reimold/mascoi/ alternative approach] has been suggested, in which the statistical map is combined with the map of the original difference in brain activity (or, more generally speaking, with the original ''contrast'') and colorcodes are attributed to the latter.
Differences in activity may also be represented as a 'glass brain', a representation of three outline views of the brain as if it were transparent. Only the patches of activation are visible as areas of shading. This is useful as a quick means of summarizing the total area of significant change in a given statistical comparison.
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