08:30 - 10:00
Mon-B22-Talk I-
Mon-Talk I-
Room: B22
Chair/s:
Sebastian Scholz
Spontaneity matters! Network alterations before and after spontaneous and active facial self-touches: an EEG functional connectivity study
Mon-B22-Talk I-06
Presented by: Kevin H. G. Butz
Kevin H. G. Butz, Stephanie Margarete Mueller, Jente Lina Spille, Sven Martin, Martin Grunwald
Haptic-Research Laboratory, Paul-Flechsig-Institut for Brain Research, Medical Faculty, University of Leipzig
Spontaneous facial self-touches (FST) are a common behavior and often directed to the mucosae, which can pose a risk for self-infection. It is speculated that spontaneous FST serve cognitive or emotional regulating mechanisms, however, function and trigger of spontaneous FST are still not clarified. Since it is time-consuming to wait for spontaneous FST in experiments, the question came up, whether spontaneous FST affect the brain similarly as FST prompted by the experimenter (active FST). To approach this question, we compared EEG-based brain connectivity before and after spontaneous and active FST. As a cover story, we asked participants to manually explore and maintain haptic stimuli for a 14 minutes-retention interval. Afterwards participants were asked to draw the shapes. At the end of the experiment, the participants were prompted to perform active FST. To spot and analyze FST, performed during the retention interval, we recorded tri-axial accelerometer, EMG-, video- and EEG-data. Comparing connectivity between pre- and post-spontaneous FST revealed tremendous differences. Few connectivity differences were observed between pre- and post-active FST. These results indicate that spontaneous FST affect other brain networks than active FST and not only sensomotoric networks. Comparing the respective pre- and post-states of spontaneous and active FST, revealed less differences between the post- than the pre-periods. These results indicate that spontaneous FST might serve a network regulatory mechanism. Whether other motor activity (spontaneous movement and body touches) affect the brain similarly as spontaneous FST is subject of our current project and will be presented during the talk.
Keywords: Self-touch, EEG, Connectivity, Regulation, Cognition, Emotion