Studying and understanding human brain structures and functions have become one of the most challenging issues in neuroscience today. However, the mammalian nervous system is made up of hundreds of millions of neurons and billions of synapses. This complexity made it impossible to reconstruct such a huge nervous system in the laboratory. So, most researchers […]

The field of cognitive aging has seen considerable advances in describing the linguistic and semantic changes that happen during the adult life span to uncover the structure of the mental lexicon (i.e., the mental repository of lexical and conceptual representations). Nevertheless, there is still debate concerning the sources of these changes, including the role of […]

Arterial input function (AIF) is estimated from perfusion images as a basic curve for the calculus of hemodynamic variables used as surrogate markers of the vascular status of tissues. However, at present, identification of AIF is made manually leading by prior knowledge. We propose an automatic estimation of AIF in perfusion images, which is based […]