Although our subjective impression is of a richly detailed visual world, numerous empirical results suggest that the amount of visual information observers can perceive and remember at any given moment is limited. How can our subjective impressions be reconciled with these objective observations? Here, we answer this question by arguing that, although we see more than the handful of objects, claimed by prominent models of visual attention and working memory, we still see far less than we think we do. Taken (...) together, we argue that these considerations resolve the apparent conflict between our subjective impressions and empirical data on visual capacity, while also illuminating the nature of the representations underlying perceptual experience. (shrink)

This chapter presents the advantages of the use of functional regions of interest along with its specific concerns, and provides a reference to Karl J. Friston related to the subject. Functionally defined ROI help to test hypotheses about the cognitive functions of particular regions of the brain. fROI are useful for specifying brain locations and investigating separable components of the mind. The chapter provides an overview of the common and uncommon misconceptions about fROI related to assumptions of homogeneity, factorial designs (...) versus independent localizers, a summary measure, and the naming of fROI. (shrink)

This article examines the functions performed by each of the “core” face processing regions: the fusiform face area, occipital face area, and superior temporal sulcus. It reviews the data from two complementary sources: functional imaging in healthy subjects and behavioral data from neurological subjects with damage to these regions. Data from functional neuroimaging allows for the determination of which regions are specifically engaged by which stimuli and which tasks; functional magnetic resonance imaging adaptation and pattern classification methods even allow for (...) the characterisation of the representations extracted in each. However, fMRI can only tell that a given region is sensitive to a particular stimulus property. fMRI cannot depict if the processing requires perceiving that property occurs in that area. In contrast, lesion data can answer the crucial question of whether a given brain region is necessary for a given computation. (shrink)