We investigated the accuracy of spatial basis function normalization using anatomical landmarks to determine how precisely homologous regions are colocalized. We examined precision in terms of: (1) the number of nonlinear basis functions used by the normalization procedure; (2) the degree of (Bayesian) regularization; and (3) the effect of substituting different templates and how this interacte...

Morphometry is introduced as quantitative approach to seek information concerning variations and changes in the forms of organisms that described the relationship between the human body and disease. Scientists of all civilization, who existed until today, examined the human body using anthropometric methods. For these reasons, anthropometric data are used in many contexts to screen for or monit...

Experimental animal studies have shown that physical exercise, associated with planning and execution of complex movements, are related to changes in brain structure. In humans, changes in cortical tissue density in relation to physical activity are yet to be fully determined and quantified. We investigated differences on gray matter volume in judo players by using voxel-based morphometry. Comp...

BACKGROUND Structural brain abnormalities have been described in individuals with an at-risk mental state for psychosis. However, the neuroanatomical underpinnings of the early and late at-risk mental state relative to clinical outcome remain unclear. AIMS To investigate grey matter volume abnormalities in participants in a putatively early or late at-risk mental state relative to their prosp...

Most image analysis systems (IAS) use black-and-white cameras. However, true color IASs are considered to be useful for quantification of immunohistologically stained structures. Using a true color IAS, we evaluated two methods of segmentation for quantification of area percentage of staining: one using fixed, preset thresholds and one using thresholds interactively set per image. Furthermore, ...

INTRODUCTION: The central nervous system is remarkably adaptive to environmental demands. In blind subjects, in particular, the brain is functionally reorganized in the absence of visual input. However, few studies have examined anatomical correlates of blindness. Here we present fully 3D maps of brain anatomical differences in earlyand late-blind subjects versus sighted subjects, detected usin...

Information about lake morphometry (e.g., depth, volume, size, etc.) aids understanding of the physical and ecological dynamics of lakes, yet is often not readily available. The data needed to calculate measures of lake morphometry, particularly lake depth, are usually collected on a lake-by-lake basis and are difficult to obtain across broad regions. To span the gap between studies of individu...

PURPOSE To investigate the changes in the intestinal epithelium of rats, when submitted to the ischemia of varied time and scheduled reperfusion. METHODS For this purpose, the following groups were established six groups: control, 10, 20, 30, 40, 60 minutes of ischemia and reperfusion time (24 hours). Their intestines being resected for histopathological analysis: the length and width of the ...

Species delimitation of geographically isolated forms is a long-standing problem in less studied insect groups. Often taxonomic decisions are based directly on morphologic variation, and lack a discussion regarding sample size and the efficiency of migration barriers or dispersal/migration capacity of the studied species. These problems are here exemplified in a water beetle complex from the Be...

In this work, three isolates of Plasmodium juxtanucleare have been analyzed based on morphological, morphometric and parasitic parameters. Each isolate was sampled from naturally infected adult chicken (Gallus gallus) from rural areas of three Brazilian municipalities: Seropédica (22 degrees 48' S; 43 degrees 41' W), in the state of Rio de Janeiro; Cruzeiro (22 degrees 33' S; 44 degrees 57' W),...