Excessive background neural activity in the motor system, resulting in difficulties in motor control and increased variation in movement response (e.g., from trial-to-trial). In fact, noise (i.e., random disturbances in signals) poses fundamental problems for information processing and all aspects of nervous system functioning down to the cellular level. In terms of motor control,a better understanding of motor noise will provide new insights into how accurate movements are performed. The significance of motor noise seems to stem for a paper by Paul M. Fitts (1912-1965), published in 1954, that revealed that there is a speed-sccuracy trade-off in that movements cannot be both fast and precise (and thereafter known as Fitts law). Motor noise has had little attention in research on child development although the notion of developmental noise has been a relatively prominent topic in developmental biology, especially with regard to the relationship between phenotype and genotype, as well as in the context of computational modeling.
See Computational models, Genotype and phenotype, Motor control, Stochasticity