Name: Merrett Wagner TA Name: Tim Campbell Section #: 504 PowerLab 1 Questions – EEG, Psychophysiology & Wii Make sure to answer all questions in complete sentences. You need to answer questions using scientific physiological terms. Answering questions in general/vague statements will result in a loss of points. 1. How does human anatomy make it difficult to record an electroencephalogram? 2. What are common causes of the artifacts you recorded? Name at least three sources of artifacts in EEG recordings, and in which waveform these artifacts are most prevalent. There were auditory and visual distractions that were common causes of artifacts in this powerlab. Three sources of these artifacts would be other people in the room to distract the subject, maybe they were distracted by something they were thinking about in their head while the experiment was going on and something that could have been happening outside, like a beeping truck or loud construction work could have been a distraction or artifact. Blinking disrupts alpha waves and causes them to be more irregular than they normally would be if the person’s eyes were closed. Beta waves are more dominant when their eyes were open and there were some spikes in the waves when she blinked her eyes. 3. Under what conditions did you see alpha waves more clearly? What are alpha waves thought to indicate physiologically?
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