title: Steady-state visually evoked potential correlates of human body perception.
abstract: In cognitive neuroscience, interest in the neuronal basis underlying the processing of human bodies is steadily increasing. Based on functional magnetic resonance imaging studies, it is assumed that the processing of pictures of human bodies is anchored in a network of specialized brain areas comprising the extrastriate and the fusiform body area (EBA, FBA). An alternative to examine the dynamics within these networks is electroencephalography, more specifically so-called steady-state visually evoked potentials (SSVEPs). In SSVEP tasks, a visual stimulus is presented repetitively at a predefined flickering rate and typically elicits a continuous oscillatory brain response at this frequency. This brain response is characterized by an excellent signal-to-noise ratio-a major advantage for source reconstructions. The main goal of present study was to demonstrate the feasibility of this method to study human body perception. To that end, we presented pictures of bodies and contrasted the resulting SSVEPs to two control conditions, i.e., non-objects and pictures of everyday objects (chairs). We found specific SSVEPs amplitude differences between bodies and both control conditions. Source reconstructions localized the SSVEP generators to a network of temporal, occipital and parietal areas. Interestingly, only body perception resulted in activity differences in middle temporal and lateral occipitotemporal areas, most likely reflecting the EBA/FBA.
authors.affiliation: Institute of Psychology, Clinical Psychology and Psychotherapy, Osnabrück University, Knollstraße 15, 49069, Osnabrück, Germany. claire-marie.giabbiconi@uos.de.
authors.forename: Claire-Marie
authors.initials: CM
authors.lastname: Giabbiconi
authors.affiliation: Institute of Psychology, Clinical Psychology and Psychotherapy, Osnabrück University, Knollstraße 15, 49069, Osnabrück, Germany.
authors.forename: Verena
authors.initials: V
authors.lastname: Jurilj
authors.affiliation: Institute of Psychology, Experimental Psychology I, Osnabrück University, Seminarstraße 20, 49074, Osnabrück, Germany.
authors.forename: Thomas
authors.initials: T
authors.lastname: Gruber
authors.affiliation: Institute of Psychology, Clinical Psychology and Psychotherapy, Osnabrück University, Knollstraße 15, 49069, Osnabrück, Germany.
authors.forename: Silja
authors.initials: S
authors.lastname: Vocks
mesh_terms: D000328:Adult; D000704:Analysis of Variance; D001921:Brain / Q000000981:diagnostic imaging* / Q000502:physiology*; D001931:Brain Mapping; D004569:Electroencephalography; D005260:Female; D018594:Human Body; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008279:Magnetic Resonance Imaging; D008297:Male; D010100:Oxygen / Q000097:blood; D010364:Pattern Recognition, Visual / Q000502:physiology*; D025341:Principal Component Analysis; D012660:Semantics; D055815:Young Adult
chemical_list: D010100:Oxygen
keywords: Body perception; Electroencephalography; Variable resolution electromagnetic tomography; steady-state visually evoked potentials