There are a variety of Brain Lesions, which cause the brain to dysfunction. Abscesses: where the brain tissue is contaminated, and therefore corrupted by 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. Strokes in a person cause Cerebral Infarction, in which a cluster of brain cells die. Tumours, are cells that grow abnormally into clumps, some of which are benign some cancerous. There are also Arteriovenous Malformations: a resultant of early where the arteries and veins to the brain interweave and become connected by fistulae, the tubes of which either burst or restrict flow of blood so that the brain tissue has impaired nutrition causing enablement. Multiple Sclerosis, is a condition where the immune system of the person damages the nerve linings in the brain and spinal cord, it causes message inhibition between the brain and the rest of...
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...d, leading to small differences in the magnetic resonance measure by the machine. Thus active areas of the brain can be imaged and correlated to presented stimuli and activities. It is indirectly invasive, the magnetic field produced travels within the brain. A further research tool is MEG, which stands for Magneto encephalogram: this records small changes in magnetic field the surface of the head, this field being generated by the cell activity in the brain. It is none invasive, a recording mechanism for the fields produced by the persons brain, in this respect there is no external magnetic field as in fMRI. EEG or Electroencephalogram, records the electrical activity of the brain via electrodes over the surface of the head, again it is not invasive. It records the electrical activity of the brain.
‘Direct Lesion Studies are different, in ethics and methodology.
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- Lesion Studies are the study of the effects and relationship between physiological and psychological processes within certain areas of the brain and central nervous system which have been damaged or rendered none-operational due to some form of accidental damage or because of experimentation. Therefore a Lesion is an area of brain tissue that has been damaged by an accident, disease or infection, or placed in a state of none-function by an experimental trial. Within Biological Psychology they are an important area of study: they provide information about loss of function in the brain area effected by the Lesion, but this can be complicated by the fact the in brain studies there can be a prim... [tags: central nervous system, brain, damage, disease]
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