Abstract
Over the past three decades of invention and refinement of neuroimaging techniques, our understanding of the brain has been remarkably enhanced. Today, there are several tools and methods by which neuroscientists and radiologists can discover more information about brain function. Yet, most of these methods have their roots in Walter Dandy's ventriculography (X-ray imaging of the brain) in the 1910s and the ground breaking work of Hans Beger in recording brain electrical activity [electroencephalography (EEG)] in the 1920s. Since then, the techniques in both acquisition and analysis of these signals have been significantly improved.
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