ABRET R.EEG.T Study Guide – Artifacts Questions With Complete Solutions

What is Glossokinetic artifact? correct answer: Artifact from the tongue movement; tip of tongue is negative, root of tongue is positive. Monitor by placing one electrode above the mouth and one electrode below the mouth. Ask the patient to say lilt or la la la to reproduce the artifact What can be done to reduce sweat artifact? correct answer: Cooling head, whip area with alcohol wipe, air condition or fan. If unable to remove you can use LFF but annotate anything done to help or changed. What is the cause of 60 Hz artifact? correct answer: The impedance of one of the active electrodes becomes significantly large between the electrodes and the ground of the amplifier. In this situation, the ground becomes an active electrode that, depending on its location, produces the 60-Hz artifact What are sources of 60Hz? correct answer: Electrode wire, metal bed frames, the patient, or technology. What are ways to eliminate 60 HZ? correct answer: Make sure electrodes are flush with the scalp and covered. Cover wires with a towel or sheet. Use a notch filter if absolutely unable to remove, but be sure to annotate any changes made to EEG. What is electrode malfunction artifact and how to eliminate it? correct answer: Caused by electrically unstable electrodes with high impedance. What is intravenous Drip Artifact? correct answer: Caused by an electrically unstable electrode of high impedance. May appear as a spike or sharp wave or a random slow