Age Related Declines Are Not Constant Across Brain Regions

Age-related declines are not constant across brain regions. Moreover, patterns of brain aging differs among individuals. Post mortem (PM) studies cannot help in assessment of brain tissue and its components. Moreover, PM cannot provide information on dynamic process of adult brain development, and its connection with brain structure and function. MRI helps in in-vivo measurements of the brain. It was realized that there is cortical thinning as age progresses. . Some studies of cortical thickness failed to replicate stability of the primary sensory regions (e.g., calcarine cortex) (Fjell et al., 2009; Salat et al., 2004) while others found that cortical thinning in frontal and parietal lobes exceed that of the temporal and occipital regions (Thambisetty et al., 2010). It is suggested that myelin is related to shrinkage in cerebral cortex or responsible for loss of cortical volume. MRI has helped evaluate leukoaraiosis which is a change in white matter integrity that is displayed on a T2-weighted MR image as a high signal intensity area. This area is defined as white matter hyperintensities (WMH) which depicts pathological processes such as ischemic lesions, gliosis, axonal degeneration, loss of myelin, microinfarcts, and expansion of perivascular spaces (de Leeuw et al., 2001; Pantoni, 1998). WHM is observed around the borders of the ventricles and deep in the subcortical WM regions. WHM is not present in health adults until the age of 50-55 (Hopkins et al., 2006). Further,Show MoreRelatedRelationship Between Age And Cognitive Functions1522 Words   |  7 Pagesintrigued in better understanding the higher levels of functions in cognition in adults and later in life for a certain reasons (Salthouse, 2012). Salthouse (2012), mentions in his article a brief review on studies focused on the relationship between age and cognitive functions. It is stated in the article that with higher levels of cognition the better an individual will function on the job, for examp le, training and achievements in job performance. Additionally, as an individual grows older they beginRead MoreBilingualism Has On The Mind Essay1810 Words   |  8 PagesFrom a young age I could remember my grandmother scolding my mother for not teaching me to speak Spanish fluently. I always questioned the importance of being bilingual, like how would this every help me in a world where English is becoming the native tongue. Before I stumbled across the research done on bilingualism I had very little to none background knowledge on bilingualism. 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