Which of the following scenarios would be most likely to induce spatial summation in a whole muscle? A single pulse of supramaximal voltage is delivered directly to a single muscle fiber by a stimulating electrode. A stimulating electrode activates a single motor unit through the sciatic nerve, multiple times in rapid succession. A stimulating electrode activates multiple motor units through the sciatic nerve at the same time. A single motor unit is activated by a single electrical pulse from a stimulating electrode.
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This would cause a single muscle fiber to contract, but it would not induce spatial summation since it only involves one muscle fiber. Option B: A stimulating electrode activates a single motor unit through the sciatic nerve, multiple times in rapid succession. Show more…
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