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Where is the reference electrode placed?(a) nasal(b) cervical(c) forehead(d) facialThis question was posed to me in an internship interview.My doubt stems from Measurement of Heart Rate in chapter Patient Monitoring System of Biomedical Instrumentation

Answer»

The correct answer is (c) forehead

Easy explanation: A pattern of electrodes on the head and the channels they are CONNECTED to is CALLED a montage. Montages are always SYMMETRICAL. The reference electrode is generally placed on a nonactive SITE such as the forehead or earlobe.



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