EEG Exam| 50 Questions| With Complete Solutions

Which of the following statements is TRUE about electroencephalography (EEG)? 1. The EEG signal is large because it is amplified as is passes through cerebrospinal fluid, bone, and skin. 2. It picks up signals from superficial layers of the brain, such as the cortex. 3. The EEG signal allows you to make conclusions about activity of a single neurons. 4. It is not a useful input signal for brain-computer interfaces. correct answer: 2. It picks up signals from superficial layers of the brain, such as the cortex standard EEG signals originate in the cortex. The electrode cannot detect signals from deeper structures nor from individual cells since it is too far away from them! On the plus side, being able to pick up cortical signals in a non-invasive manner makes EEG a great interface for controlling computers. However, the signal does diminish as is passes through all of the material between the brain and skin. Which statement is FALSE? 1. The term for the tool used to generate the PSD plot is called the Fast Fourier Transform. 2. If you do not see a band on the spectrogram, you may have to adjust the scale. 3. It is possible to identify the different frequencies in a recording (even with substantial noise present) by using the PSD plot. 4. Time is plotted on the X axis of the PSD plot. correct answer: 4. Time is plotted on the X axis of the PSD plot. The PSD plot does not provide time information. Frequency is plotted on the X axis in a PSD plot. If we altered our in-class experiment such that 10 participants were exposed to the almond oil condition for several minu