In recent years, research into functional interhemispheric asymmetry has been intensively carried out in our country and abroad. An analysis of publications related to this topic shows that the problem of interhemispheric asymmetry is associated with some fundamental properties of living matter and is present at almost all stages of the evolutionary ladder. In the 30-40s of the 20th century, the study of functional asymmetry in healthy people began. The identified asymmetries were divided into three main types: mental, motor and sensory.