According to the information, tetanic contraction is linked to which current?

• A. Low Frequency Current
• B. High Frequency Current
• C. Both
• D. Neither

Answer: (A)

Tetanic contraction occurs when muscle fibers are stimulated in a way that their individual twitches sum to produce a continuous, sustained contraction. In the material you’re studying, that sustained contraction is linked to using a low frequency current. The idea is that the pulses arrive with enough closeness that the muscle doesn’t fully relax between stimuli, allowing the contractions to merge into one prolonged contraction. That’s why the information ties tetanic contraction to low frequency current. High frequency current can also produce strong contractions, but the specific statement here identifies tetanus with the low frequency category.