Which current is used to produce chemical effects in tissues and is a direct current?

Which current is used to produce chemical effects in tissues and is a direct current?

• A. Galvanic
• B. Alternating current
• C. Faradic current
• D. Microcurrent

Answer: (A)

Direct current flows in one direction, which drives continuous ion movement and causes electrochemical reactions at the tissue–electrode interface. This steady flow produces chemical effects like electrolysis and local pH changes in tissues. That’s the hallmark of galvanic current in electrotherapy. Alternating current reverses direction each half-cycle, so ions don’t accumulate in one spot and electrolysis effects are minimized, making it more about stimulation than chemical change. Faradic current is an interrupted (pulsed) form of current derived from AC and is used mainly for nerve and muscle stimulation rather than sustained chemical reactions. Microcurrent uses very low amplitudes and is typically associated with healing effects that involve minimal electrochemical change. So the current that both produces chemical effects and is direct is galvanic.

Direct current flows in one direction, which drives continuous ion movement and causes electrochemical reactions at the tissue–electrode interface. This steady flow produces chemical effects like electrolysis and local pH changes in tissues. That’s the hallmark of galvanic current in electrotherapy. Alternating current reverses direction each half-cycle, so ions don’t accumulate in one spot and electrolysis effects are minimized, making it more about stimulation than chemical change. Faradic current is an interrupted (pulsed) form of current derived from AC and is used mainly for nerve and muscle stimulation rather than sustained chemical reactions. Microcurrent uses very low amplitudes and is typically associated with healing effects that involve minimal electrochemical change. So the current that both produces chemical effects and is direct is galvanic.