Figure 4
From: Brain-to-brain entrainment: EEG interbrain synchronization while speaking and listening
Representation of statistically significant enhanced interbrain synchronization patterns between the listeners and the speakers during oral narratives that are not explained by brain-audio envelope synchronization. Matrices on the right are those reported for group statistics on the interbrain synchronization patterns provided in Fig. 1, after deleting those electrode combinations where brain-to-brain synchronization is explained by the brain-audio envelope synchronization and after deleting electrode combinations that contain at least one electrode showing entrainment to speech. The plots on the left are an alternative representation of the information contained in the matrices. The red head represents the Speaker and the blue head represents the Listener, with the green lines connecting those electrode pairs that show significant enhancement in synchronization. In the alpha band (upper panel) the sites showing interbrain coupling are mainly frontal for the Listener and central for the Speaker. In the beta band (lower panel) the sites are mainly frontal for the Speaker and temporal for the Listener.
