Artikel high frequency posttetanic

5 important questions on Artikel high frequency posttetanic

Describe the term 'potentiation':

Enhanced muscle performance after previous activity

What are the most well-known forms of potentiation?

  1. posttetanic potentiation
  2. high frequency initial pulses

To what extent are the effects following HFIP dependent on activation frequency?

Low frequencies induce both an increase in peak force AND an increase in the rate of force development.
High frequencies only increase the rate of force development.
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What are possible mechanisms for PTP?

  • Increased effect of Ca2+ on cross-bridge formation
  • increased level of myosin light chain phosphorylation

What can be advantages of lowering the stimulation frequency to attain a certain Force?

  1. reduce the risk of high-frequency fatigue
  2. metabolic demands are lower as less often Ca2+ has to be re-uptaken

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