Electrical Activities in the Human Body

3411 WordsFeb 1, 201814 Pages
Introduction Biopotential signals are electrical activities of the human body systems which are measured by potential fluctuations between points in living cells, tissues and organisms .In medicine field, certain biopotential signals are important as they are considering diagnosis and patient monitoring. These signals represent the activity of particular organs such as the heart, brain, muscles and many more. With the help of specialised electrodes, biopotential signals transduce low-noise and artefact-free signals to the organ or the body. A basic biopotential amplifier consists of an instrumentation amplifier. The amplifier should have several characteristics such as high amplification, input impedance and the ability to reject any electrical interference. These characteristics are needed to measure biopotentials signals. Other component can be added to the circuit in order to improve the signals; filter can be added to reduce electric interference, electric isolation and defibrillation shock protection. The electrical activity can originate from different tissues and organs sources. There are different sources of biopotential signals such as EEG, ECG, EMG; they are all based on the same principles however the signals will have smaller amplitudes. Electroencephalogram (EEG) records the electric activity of the
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