Your back, for example, is far less sensitive to touch than is the skin on your face. Weber discovered that the ability to recognize these “just noticeable differences” depended on where on the body the compass was positioned. As Weber repeated the process with ever closer points, however, most people lost the ability to tell the difference between them. When the points were far apart the research participants could easily distinguish between them. Using a drafting compass he placed the two points far apart and set them on the skin of a volunteer. Weber was particularly interested in the sense of touch. It is obvious that we use our sensory organs-our eyes, and ears, and nose-to take in and understand the world around us. In the 1800s a German scientist by the name of Ernst Weber conducted several experiments meant to investigate how people perceive the world via their own bodies ( Hernstein & Boring, 1966). Name at least three neuroimaging techniques and describe how they work.Articulate how the primary motor cortex is an example of brain region specialization.Identify the location and function of the limbic system.Explain how neurons communicate with each other.Name the various parts of the nervous system and their respective functions.Functional magnetic resonance imaging (fMRI).
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