Steady-state visually evoked potential correlates of human body perception

Autor(en): Giabbiconi, Claire-Marie
Jurilj, Verena
Gruber, Thomas 
Vocks, Silja 
Stichwörter: Body perception; BRAIN; CORTEX; EEG; Electroencephalography; FACE PERCEPTION; FUSIFORM GYRUS; GAMMA-BAND RESPONSES; MECHANISMS; Neurosciences; Neurosciences & Neurology; OBJECT RECOGNITION TASK; SELECTIVE ATTENTION; SPATIAL ATTENTION; steady-state visually evoked potentials; Variable resolution electromagnetic tomography
Erscheinungsdatum: 2016
Herausgeber: SPRINGER
Journal: EXPERIMENTAL BRAIN RESEARCH
Volumen: 234
Ausgabe: 11
Startseite: 3133
Seitenende: 3143
Zusammenfassung: 
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.
ISSN: 00144819
DOI: 10.1007/s00221-016-4711-8

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