What happens to the muscle in the latent period?
What happens to the muscle in the latent period?
During the latent period, the action potential is being propagated along the sarcolemma. During the contraction phase, Ca++ ions in the sarcoplasm bind to troponin, tropomyosin moves from actin-binding sites, cross-bridges form, and sarcomeres shorten.
Does the muscle tension change during the latent period?
A Myogram of a Muscle Twitch A single muscle twitch has a latent period, a contraction phase when tension increases, and a relaxation phase when tension decreases. During the latent period, the action potential is being propagated along the sarcolemma.
What is latent period in nervous system?
Latent period (epidemiology), the time interval between when an individual is infected by a pathogen and when he or she becomes capable of infecting other susceptible individuals. Muscle contraction, the time between a stimulus to the nerve and the contraction of the muscle.
What occurs during the latent phase of a muscle twitch?
A twitch occurs when one muscle fiber contracts in response to a command (stimulus) by the nervous system. The time between the activation of a motor neuron until the muscle contraction occurs is called the lag phase (sometimes called the latent phase).
Why does the latent period occur?
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 latent period is a short delay (1-2 msec) from the time when the action potential reaches the muscle until tension can be observed in the muscle.
How is the latent period like the period of relaxation?
Following the latent period is the contraction phase in which the shortening of the sarcomeres and cells occurs. Then comes the relaxation phase, a longer period because it is passive, the result of recoil due to the series elastic elements of the muscle.
Does the duration of the latent period change with different stimulus voltages?
The latent period did not change with changes in stimulus voltage.
What happens during the latent period for an isometric contraction?
What occurs during the latent period of these isometric contractions? All the steps of excitation-contraction coupling occur.
Why is there a latent period?
A latent period allows study of alterations of anatomy and physiology before, during, and after onset of epileptogenesis and the model, therefore, may be ideal for experiments focused on underlying cellular mechanisms and antiepileptogenic strategies.
What is latent period in muscle contraction?
The latent period, or lag phase, the contraction phase, and the relaxation phase. The latent period is a short delay (1-2 msec) from the time when the action potential reaches the muscle until tension can be observed in the muscle.
What is true latent period in muscle contraction?
“True” Latency. —The interval after the beginning of the electrical response during which the mechanical conditions are unaltered. This is the same whether thickening is recorded, or whether determined by the response of the tendon, and has an absolute value 1·5 to 2·0σ.
What is latent period of virus?
The latent period is the time taken by a phage particle to reproduce inside an infected host cell. At the population level in a one-step growth curve, it can be represented as the time taken for the newly formed phage particles to appear in the media.
How long is the latent period when a muscle twitch?
A single muscle twitch has three components. The latent period, or lag phase, the contraction phase, and the relaxation phase. The latent period is a short delay (1-2 msec) from the time when the action potential reaches the muscle until tension can be observed in the muscle.
What is latent period physiology?
latent period The interval between exposure to an infectious organism or a carcinogen and the appearance of symptoms or signs of disease. The period elapsing between the application of a stimulus and the expected response, such as the contraction of a muscle.
What happens during the latent period of muscle contraction?
During the latent period, the stimulus applied to a muscle excites chemical changes which result in contraction; but if the stimulus be very small, the chemical changes may be so slight that contraction does not occur.
Does the latent period change with different stimulus?
The duration of the latent period doesn’t change with different stimulus voltages because usually if you give more stimulus, there is only a change in the contraction and relaxation phases, not latent phase. This is because the time period between the stimulus being applied and when the muscle contracts is a short time period.