This is the 2007 version. Click here for the 2017 chapter 02 table of contents.

Brain Stimulation

Just as psychologists can learn about brain/behavior relationships by observing the effects of injury (which typically produces a deficit or absence of a skill) they can also learn from effects of brain stimulation. The most common result of applying electrical current to the brain is to disorganize its activity or cause a seizure. However, in some cases, application of mild electrical current will stimulate an action or a mental construction. That is interesting to neuropsychologists, because it suggests that the current has activated a discrete circuit or brain system, and it gives us some insight about how the brain is organized and divided up into functional sections.

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