describe surface electrode.?
Answers
Answer:
surface electrode is the electrode applied to the skin for subject ,commonly used for ECG mesurments
Answer:
Surface electrodes are types of electrodes applied to the skin of the subject. Major applications include electrocardiography (ECG), electromyography (EMG), or electroencephalography (EEG), which are techniques for recording and evaluating the electrical activities of the heart, skeletal muscles and neurons of the brain, respectively, from the surface of the skin. Other types of electrodes are used to measure the conductance of body parts. Examples are measurements of skin conductance or transthoracic impedance. In some cases, electrodes are simple metal plates connected with a lead wire. Electrode may be made in the form of a suction cup attached with a bulb, facilitating easy attachment and relocation (see Fig. 8.2A). Commonly used for EEG measurements are cup-shaped gold electrodes with an open apex, from which electrolyte gel can be added to improve connection (Fig. 8.2B). Dry electrodes are types of electrodes that do not use electrolyte. They are typically made of silicone elastomer added with graphite powder (Fig. 8.2C). One of the most important goals for desirable surface electrodes is to obtain a lower contact impedance, which is crucial to attain high signal-to-noise ratio.
Emerging types of surface electrodes are microfabricated wearable electrodes. Those electrodes are often made of flexible and biocompatible materials that are directly in contact with the skin surfaces.
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