Question

What is muscle twitch ? Describe it's phases .​

Answer 1

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A muscle twitch is an involuntary contraction of the fibers that make up a muscle. Nerves control muscle fibers. When something stimulates or damages a nerve, it causes the muscle fibers to contract, resulting in a twitch. A person can often see or feel these twitches below the skin.

When an action potential travels down the motor neuron, it will result in a contraction of all of the muscle fibers associated with that motor neuron. The contraction generated by a single action potential is called a muscle twitch. The latent period, or lag phase, the contraction phase, and the relaxation phase.

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Answer 2

The contraction generated by a single action potential is called a muscle twitch. ... The contraction phase is when the muscle is generating tension and is associated with cycling of the cross bridges, and the relaxation phase is the time for the muscle to return to its normal length.