## 3 Results
Moreover, the composition of connections was almost identical for the groups of low-, middle-, and high-coherence levels (Figure 4). Nonetheless, several differences were observed for the group with high coherence levels (\(0.7<K<1\)). The perception of neutral faces modulated by negative stimuli,  
Figure 3: Topographical maps of coherent connections of different strength (red—\(0.3<K<0.5\), blue—\(0.5<K<0.7\), black—\(0.7<K<1.0\)) within EEG sub-bands during emotional facial perception: reaction to positive faces (**A**), reaction to negative faces (**B**). compared to the series of positive-primed ones, was characterized by the absence of the left hemispheric connection within frontocentral (\(F3\)-\(C3\)) cortical areas in the \(\theta_{1}\) sub-band and the right hemispheric temporocortical (\(C4\)-\(T4\)) relation in \(\theta_{2}\) (Figure 4). In addition, there was an interaction between the left posterior-temporal and parietal regions (\(T5\)-\(P3\)) observed in the \(\alpha_{3}\) EEG sub-band during the perception of neutral stimuli preceded by negative ones (Figure 4). Otherwise, no significant differences were revealed in the topography of distant EEG-synchronization distribution. Furthermore, the analysis of the topographical distribution of distant connections in our study from the gender perspective showed a general decrease in connection strength (\(K<0.7\)) throughout the consequent stages of the experiment. Moreover, in almost all cases, changes in coherence levels were mainly located in the orbitofrontal cortex and precentral areas cortical areas (\(F3;Fz;C3;Cz;C4\)) within the right hemisphere in almost all EEG ranges (Figure 5). At the same time, a differential effect of the presented facial valence on the topography and the number of distant connections were observed. For instance, the  
Figure 4: Topographical maps of coherent connections of different strength (red—\(0.3<K<0.5\), blue—\(0.5<K<0.7\), black—\(0.7<K<1.0\)) within EEG sub-bands during emotional facial perception: reaction to the first set of neutral faces after positive faces (**A**); reaction to the second set of neutral faces after negative faces (**B**). second series of neutral faces processing was characterized by fewer coherent connections than the first neutral series was. On the other hand, the demonstration of emotional faces was associated with increased functional connections, especially when the subjects were presented with positive stimuli. In addition, enhanced coherence levels were observed in the female group within the \(\beta_{2}\) sub-band during all types of experimental stimulation. For instance, positive stimuli elicited the emergence of symmetrical connections between the left central \((C3)\) and posterior frontal areas \((F7;F8)\)\((K<0.5)\), while the presentation of negative faces resulted in left hemispheric temporal association \((T3\)-\(T5)\)\((K>0.7)\). In the case of neutral stimulus processing, connections within the left frontal area \(Fp1\)-\(Fz\) (in n1 series) and \(Fp1\)-\(F3\) (in n2 series) were observed \((K<0.7)\). Lastly, the values of the coherence coefficient were generally higher \((0.5<K<0.7)\) for bands of low-frequency EEG oscillations \((\theta_{1},\theta_{2};\alpha_{1})\), and lower \((K<0.5)\) for high-frequency oscillations \((\alpha_{3};\beta_{1},\beta_{2})\) (Figure 5). At the average DMA analysis level, no statistically significant differences were obtained for the trials with emotional stimuli (Figure 6). Interestingly, the DMA algorithm results marked the tendencies mentioned above on the intergroup level from a slightly different perspective. In this case, the male group showed an occipitopaetal activation region within the \(\beta_{1}\) EEG sub-band while processing neutral images preceded by both positive and negative emotional stimuli. This fact once again stands for the general activation of the cognitive beta network.