Аннотация:The topic of this paper is an analysis of the influence of brain state regulation (specifically, the functions of the first energetic unit of the brain, according to Luria) on performing a RAN / RAS technique. Three groups of primary school children participated in the study: children with good brain state regulation (n = 101) and children with poor brain state regulation, who were divided in two groups: those with slow processing speed and rapid fatigue (n = 29) and those with hyperactivity and impulsivity (n = 20). Each child passed a full Lurian neuropsychological battery of tests for children between the ages of 5 and 9 years old (Akhutina et al., 2013), followed by the RAN / RAS technique. The present study revealed a complex and varied picture of the combined influence of brain state regulation and executive functions on performing the RAN / RAS technique in children with poor brain state regulation. More clearly, the results showed that weakness of the first brain unit influences children with slow cognitive tempo: data were obtained about the impact of slowness on the execution time of the first " Objects " subtest and RAS subtests. Children with hyperactivity showed large fluctuations of success and execution time with the subtest. According to the literature, that is typical of children with ADHD who have severe symptoms of hyperactivity-impulsivity and executive function weakness.