Critically evaluate the methods of investigation employed by neuropsychologists.

... Critically evaluate the methods of investigation employed by neuropsychologists. This essay aims to look at some of the methods of investigation employed by neuropsychologists when trying to find the root of neuropsychological problems in clients. This essay will focus on the brain imaging techniques available to neuropsychologists for identifying brain structure, brain function and brain abnormality. The specific techniques that will be evaluated are Computerised Axial Tomography (CT scan), Positron Emission Tomography (PET scan), Magnetic Resonance Imaging (MRI scan) and Fluorescent Magnetic Resonance Imaging (fMRI scan). These techniques will be described briefly and their advantages and disadvantages discussed. In the late nineteenth century, an Italian physiologist named Angelo Mosso began to experiment with the idea that changes in the flow of blood in the brain might provide a way of assessing brain function during mental activity through observation of the fontanelles in newborn children and also in two adults who had

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