The processing of visual information requires synchronization of the rhythmic activity of neural ensembles performing the same task. This implies the existence of similar
dominant frequencies in areas that perform the same task. It is assumed that rhythmic photostimulation at dominant frequencies may cause a resonant effect, due to the fact that the
frequency of an external stimulus coincides with the dominant frequency of the brain. More
detailed studies of the resonance phenomenon in humans are difficult. The visual system of
the macaque primate is similar to the human visual system. In addition, the primate of this
species has a close phylogenetic relationship to humans. The aim of the study was to identify the resonance reactions of the macaque brain and to compare them with the dominant
frequencies. Three primates were investigated. The photostimulation was carried out with
frequencies from 2 to 46 Hz with a step of 2 Hz. The existence of resonance reactions for frequencies of 10, 20, and 40 Hz, which is similar to the data on the resonance reactions of the
human brain, was elucidated. A partial coincidence of the resonant and dominant frequencies was noted. The data obtained suggest that the macaque can be considered as a model
organism for a more detailed study of the resonant phenomenon of the human brain.