In this essay, I will talk about how neuroimaging studies are very important and advanced people understanding of the brain.
In the study of brain, many new technologies have been released. The function neuroimaging techniques, PET (Positron Emission Temography) and fMRI (functional Magnetic Resonance Imaging), offer sufficient experimental result and efficient way of brain study. PET and fMRI are new kind of medical instrument which is different from the physical tools, without having to open the skull in order to peer inside, take some brain tissue, or actually do some research. They use radio sensors send and receive the radiation frequency to build the image, they"re also called, "The Window on the brain". They are similar techniques in the sense that both rely on changes in haemodynamic responses that are correlated with changes in neuronal activity: PET is sensitive to local changes in blood flow, and fMRI is sensitive to oxygen changes in the magnetic properties of blood. As you can see inside of the brain from the monitor and even how it response in any particular task, it's obviously an advantage study techniques. .
Neuropsychological studies are another way of the brain study. It deals with lesion patient's brain. In other word, it study on how damanged brain response and interact by different kinds of lesion. One main problem of this study is lack of patient, and the patients" behavior are different, therefor it's very difficult to predict and figure out the result of the study. That makes inaccurate result.
There are a number of advantages of neuraimaging over neuropsychology with regard to understanding the functional of frontal cortex. First, neuropsychological studies deal with lesion that often differ markedly in size, location, and position across different patients. PET and fMRI offer a more accurate and precise spatial characterization of functional differentiation across frontal cortex (FC).
