Latency Period

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Latency Period


(1) In physiology, the time from the moment of stimulation of an organism, organ, tissue, or cell until the manifestation of a responsive reaction.

The duration of the latency period depends on the level of phylogenetic development, individual development, and functional state of the body and on the complexity of the reaction and the speed of the processes in its peripheral and central links. Thus, the latency period of a given reflex consists of the time it takes to transform the energy of the external stimulus in the receptor, the time necessary to conduct the excitation along the nerve fibers, the duration of the synaptic lags, and the time required to trigger the effectors.

The latency period of psychological reactions characterizes the level of wakefulness and the states of attentiveness and tension. Determination of the magnitude of the latency period is of great importance in physiology, medicine (for studying the functions of the healthy and the diseased body), and experimental psychology.

(2) The latency period of pregnancy is a temporary lag in the development of the fertilized ovum in certain mammals; during the late blastula stage, the embryo lives in the womb for several months without attaching to the uterine mucosa. Fertilization of the sable, marten, ermine, badger, and roe deer occurs during the summer-fall period, but accelerated development of the ovum does not begin until the end of winter; hence, gestation in those animals goes on for nine months or more.

(3) In medicine, incubation period; the initial, latent period of a disease, without external manifestation.

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This becomes particularly problematic when studying chronic health outcomes such as cancer, with the latency periods often years after exposure, beyond the average time of military service.
The latency period is anywhere between 20 and 50 years.
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A twelve-month latency period likely imposes little of those costs given that most states have legislative sessions of limited duration, which realistically limits the number of changes that can occur over the period.
For most cancers, the latency period is quite long," he says.
The average latency period for the disease is 30 to 40 years.
Table 2 shows that the latency period was significantly shorter in the OM group than in the MS group, with a mean of 17.
apigenin significantly shortened the latency period of picrotoxin induced fits but did not reduce the incidence of seizures.
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If you can reduce this latency period you will have more hair
They included small sample size, a latency period too short to account for the long lapse between exposure and onset of cancel', and other potentially influencing factors because they, too, cause lung cancer or are believed to cause it.