[Asymmetry of motor function in the forelimbs of cats].

82% of cats revealed natural domineering of forelimbs forming in early ontogenesis movements of different degrees of complexness in conditions of equal input signals so both hemispheres. Among these animals 75% appeared to be "right-pawed". This phenomenon points out an initial, apparently hereditary interhemisphere asymmetry of functional state of the brain motor structures.