Assuming that the twitch occurs when the muscle contracts, the time that represents where the twitch starts is approximately 400ms.
What is a twitch muscle contraction?
It refers to the muscle contraction by the nervous system due to an external stimulus.
Different techniques use twitches to study the contraction of the muscle fibers. For instance, Interpolated Twitch Technique measure the extent of voluntary muscle activation.
There are different phases through which the muscle goes since it gets the stimuli,
- There is a lag phase between the activation of the motor cells and the fiber contraction. During this time, the action potential moves through the motor neuron.
- The contraction phase occurs when the muscle gets actually contracted, during which actin and myosin interact.
- The relaxation phase is the last one to occur, in which troponin blocks the binding sites of myosin, so it can not interact with actin. The muscle relaxes.
Assuming that the twitch occurs when the muscle contracts, the time that represents where the twitch starts is approximately 400ms.
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