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abdominal active electrode acute alternating current apparatus applied arthritis atrophy bath blood body carbon cause cells cent cervical cervix Chapter chronaxie chronic circuit clinical coagulation coil cold condenser contraction cord current flow current strength direct current disease dispersive electrode effect electric current electrodesiccation electrosurgery electrotherapy employed energy erythema exercises exposure faradic fever therapy frequency galvanic current heliotherapy high-frequency increase inductance infection infrared injury insulated intensity ion transfer iontophoresis irradiation joint Jour lamp lesions light light therapy long-wave diathermy low-frequency massage ment mercury metal meter method mild milliamperes minutes motor muscle muscular needle negative pole nerve neuritis oscillations pain paralysis patient peripheral physical measures physical therapy physiological plate positive pole produced quartz rays reaction resistance roentgen-ray short-wave diathermy skin spasm stimulation suitable surgical technique temperature therapeutic thermal tion tissue treated tube tuberculosis ultraviolet radiation usually vascular voltage wave lengths