To determine the most appropriate duration of impulse to stimulate all muscle fibers in a denervated muscle, we must consider the basic physiological properties of denervated muscles. Denervated muscles require longer duration impulses to be stimulated effectively compared to innervated muscles.
Key Concept: When muscles are denervated, their threshold for electrical stimulation increases significantly. In practical clinical settings, to stimulate these muscles effectively, the impulse duration must be long enough to ensure that the threshold is reached.
The options provided are different impulse durations: 80 ms, 50 ms, 300 ms, and 10 ms. Given that longer durations are required for denervated muscles:
- 10 ms: This is generally too short for reliably stimulating denervated muscles.
- 50 ms and 80 ms: Though longer, they may still not be optimal for all muscle fibers in a denervated muscle.
- 300 ms: This duration is significantly longer and typically adequate to ensure the stimulation of the majority, if not all, muscle fibers in a denervated muscle.
Conclusion: The most appropriate duration to stimulate all muscle fibers in a denervated muscle, assuming constant intensity, is 300 \text{ ms}. This duration allows sufficient time for the muscle fibers to reach their action potential threshold.
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- Who was the founder of Bolshevik Communist party?
- What is the key guide to statecraft in the realist tradition?
- Chronologically arrange the events in the Cold War period.
A. Berlin Wall is constructed
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C. Soviet invasion of Czechoslovakia
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A. Politics is rooted in permanent and unchanging human nature which is basically self centred, self-regarding and self-interested
B. Politics is an autonomous sphere of action and cannot therefore be reduced to morals
C. International Politics is an arena of conflicting self-interests
D. The ethics of international relations is situational ethics which is very different from private morality
Choose the correct answer from the options given below:Who among the following political thinkers consider the anarchical self help system to be a compelling factor for States to maximise their relative power positions?
