I like to move it (move it): EEG Correlates of Mobile Spatial Navigation B Ehinger, P Fischer, A L Gert, L Kaufhold, F Weber, M Marchante Fernandez, G Pipa, P König |
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Institute of Cognitive Science, University of Osnabrueck, Germany
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| In everyday life navigation, active movement generates visual, vestibular and kinesthetic information. Yet, studies of human navigation commonly employ stationary setups with obvious consequences on vestibular and kinesthetic feedback. Here, we demonstrate a fully immersive virtual reality with systematic control of vestibular and kinesthetic information combined with high density mobile EEG to investigate cortical processing in a spatial navigation task. The experiment is based on a modified triangle completion task: Participants traversed one leg of a triangle, did an on-the-spot-turn and continued along the second leg. They then had to point back to their starting position. We employed a 2x2 intra subject design, manipulating vestibular and kinesthetic information. The 128 Electrode EEG-data of all subjects (n=5) were analyzed by clustering blind source separated independent components (ICs) dipoles with their respective event-related spectral perturbations (ERSP). We select five IC-clusters, partially replicating earlier studies (e.g. Gramann et. al., 2010, JoCN, 22:12) in occipital, parietal and premotor areas. Specific alpha desynchronisation of ERSPs during the turn can be related to increased demand concerning visuo-attentional processing. Cluster-specific modulations of condition are present, which are potentially related to the additional vestibular and kinesthetic information provided. |
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