According to the claim that tetanic contractions are not set up by currents, which current is the right choice?

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Prepare for the REMBE Electrotherapy Test. Study with flashcards and multiple choice questions. Each question comes with hints and explanations. Master electrotherapy concepts and get ready for your exam!

Multiple Choice

According to the claim that tetanic contractions are not set up by currents, which current is the right choice?

Explanation:
The key idea is how stimulation frequency drives muscle response. Tetanic contraction happens when impulses arrive so quickly that the muscle fibers don’t have time to relax between stimuli, so the contractions fuse into a sustained, smooth force. That requires a high-frequency current, which delivers pulses rapidly enough to cause summation of contractions. A low-frequency current, by contrast, produces separate twitches with relaxation between them, not a fused tetanus. So the high-frequency current is the one that can set up tetanic contraction, while the others do not.

The key idea is how stimulation frequency drives muscle response. Tetanic contraction happens when impulses arrive so quickly that the muscle fibers don’t have time to relax between stimuli, so the contractions fuse into a sustained, smooth force. That requires a high-frequency current, which delivers pulses rapidly enough to cause summation of contractions. A low-frequency current, by contrast, produces separate twitches with relaxation between them, not a fused tetanus. So the high-frequency current is the one that can set up tetanic contraction, while the others do not.

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