Injury studies are the study of the effects of and relationship between physiological and psychological processes within certain areas of the brain and central nervous system that have been damaged or rendered inoperative due to of some form of damage accidental or due to experimentation. Therefore a lesion is an area of ​​brain tissue that has been damaged by an accident, disease or infection, or placed into a non-functional state by an experimental test. Within biological psychology they constitute an important area of ​​study: they provide information on the loss of function in the brain area affected by the lesion, but this can be complicated by the fact that in brain studies there can be a primary or complementary role of function where brain injury occurs. There are several brain injuries that cause brain dysfunction. Abscesses: where the brain tissue is contaminated and therefore corrupted by the disease. Various forms of dementia, for example Alzheimer's disease: where lesions occur due to the death of nerve cells, leading to a deterioration of brain function in those areas. Experimental lesion studies in mice have allowed a correlative relationship between stroke and Alzheimer's disease: in particular micro-strokes that are asymptomatic and do not show early signs of the disease, as in the lesion experiment of (Garcia-Alloza et al 2011). Although despite having good correlative extrapolation, they are touching of their own experimental design to criticize the use of mice as a direct translation to humans, a problem that all brain injury experiments on animals raise in inferring results on humans. Strokes in a person cause cerebral infarction, in which a group of brain cells dies. Using Lesion st...... middle of paper ......atomic analysis of brain lesions in 100 patients. Brain, A Journal of Neurology, 134, p 2960-2960. doi:10.1093/brain/awr235Ritsner, M.M., Ben-Avi, II, Ponizovsky, A.A., Timinsky, II, Bistrov, E.E., & Modai, II (2003). Quality of life and management of symptoms of schizophrenia. Quality of Life Research, 12(1), 1.Schizophrenia.com Facts accessible on; 15.11.2013Shenton ME, Dickey CC, Frumin M, McCarley RW.(2001) A review of MRI findings in schizophrenia. Schizophrenia research. 2001:49: p 1_52.Wall Street Journal. (2007) Brain surgery is applied to mentally ill people in China. By Zamiska. N. Weinberger, D. R., McClure, R. K. (2005). Magnetic imaging neurotoxicity, neuroplasticity and morphometry. Archive of General Psychiatry 2005;/59: p 553_8.