1. When stimulating the sciatic nerve, what happens to the number of fibers prod

Question

1. When stimulating the sciatic nerve, what happens to the number of fibers producing action potentials as you increased the voltage?

2. When you directly stimulate the muscle: a) Why does the force increase as the voltage is increased? b)Would this be considered motor unit recruitment?

3. After reaching the maximal response, why doesnt the force of contraction increase as the stimulus amplitude increases?

4. Does the Latent Period, Duration of Contraction, or Duration of Relaxation change with stimulus strength?

Explanation / Answer

According to chegg rules, we can answer only one question per post.

When we stimulate the sciatic nerve, action potentials are produced by the fibers in the nerve. When we increase the voltage, more fibres join to produce action potential. The faster fibres will respond sooner and the slower fibres will respond later. So, the action potential increases till the threshold. After that, even with increase in voltage, there is no increase in action potential

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