Present is the day of science and technology. Everyday each and every aspect of science and technology are being flourished. Neural disorder or dementia has become alarming at present age. Several neuro-imaging techniques have already been developed. But the success lies in the use of non-invasive neuroimaging. Prediagnosis of the disease "dementia" can mitigate this rate of acute sufferings of patients. Such a noninvasive technique is fMRI or Functional Magnetic Resonance Imaging. In this research a comperative analysis of different neuroimaging has been presented. Also Neuronal response in human visual and motor cortex in normal healthy patients have been studied.To do this Functional Magnetic Resonance Imaging or fMRI has been used that measures the hemodynamic response related to neural activity in human brain.