Electroencephalographic Correlates of Sensorimotor Integration and Embodiment during the Appreciation of Virtual Architectural Environments

Giovanni Vecchiato; Gaetano Tieri; Andrea Jelic; Federico De Matteis; Anton G Maglione; Fabio Babiloni

doi:10.3389/fpsyg.2015.01944

Electroencephalographic Correlates of Sensorimotor Integration and Embodiment during the Appreciation of Virtual Architectural Environments

Front Psychol. 2015 Dec 22:6:1944. doi: 10.3389/fpsyg.2015.01944. eCollection 2015.

Authors

Giovanni Vecchiato¹, Gaetano Tieri², Andrea Jelic³, Federico De Matteis³, Anton G Maglione¹, Fabio Babiloni⁴

Affiliations

¹ Department of Physiology and Pharmacology, Sapienza University of Rome Rome, Italy.
² Laboratory of Social Neuroscience, IRCCS Fondazione Santa LuciaRome, Italy; Department of Psychology, Sapienza University of RomeRome, Italy.
³ Department of Architecture and Design, Sapienza University of Rome Rome, Italy.
⁴ Department of Molecular Medicine, Sapienza University of Rome Rome, Italy.

Abstract

Nowadays there is the hope that neuroscientific findings will contribute to the improvement of building design in order to create environments which satisfy man's demands. This can be achieved through the understanding of neurophysiological correlates of architectural perception. To this aim, the electroencephalographic (EEG) signals of 12 healthy subjects were recorded during the perception of three immersive virtual reality environments (VEs). Afterwards, participants were asked to describe their experience in terms of Familiarity, Novelty, Comfort, Pleasantness, Arousal, and Presence using a rating scale from 1 to 9. These perceptual dimensions are hypothesized to influence the pattern of cerebral spectral activity, while Presence is used to assess the realism of the virtual stimulation. Hence, the collected scores were used to analyze the Power Spectral Density (PSD) of the EEG for each behavioral dimension in the theta, alpha and mu bands by means of time-frequency analysis and topographic statistical maps. Analysis of Presence resulted in the activation of the frontal-midline theta, indicating the involvement of sensorimotor integration mechanisms when subjects expressed to feel more present in the VEs. Similar patterns also characterized the experience of familiar and comfortable VEs. In addition, pleasant VEs increased the theta power across visuomotor circuits and activated the alpha band in areas devoted to visuospatial exploration and processing of categorical spatial relations. Finally, the de-synchronization of the mu rhythm described the perception of pleasant and comfortable VEs, showing the involvement of left motor areas and embodied mechanisms for environment appreciation. Overall, these results show the possibility to measure EEG correlates of architectural perception involving the cerebral circuits of sensorimotor integration, spatial navigation, and embodiment. These observations can help testing architectural hypotheses in order to design environments matching the changing needs of humans.

Keywords: affordances; architecture; electroencephalography; embodiment; immersive virtual reality; presence; sensorimotor integration; spatial navigation.