Electrophysiological correlates of gist perception: a steady-state visually evoked potentials study
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| Titel: | Electrophysiological correlates of gist perception: a steady-state visually evoked potentials study |
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| Autoren: | Elise L. Radtke, Benjamin Schöne, Ulla Martens, Thomas Gruber |
| Quelle: | Exp Brain Res |
| Verlagsinformationen: | Springer Science and Business Media LLC, 2020. |
| Publikationsjahr: | 2020 |
| Schlagwörter: | Adult, 05 social sciences, Electroencephalography, Brain Waves, Intermodulation frequency, Adult [MeSH], Electroencephalography/methods [MeSH], Humans [MeSH], Steady-state visually evoked potentials, EEG, Brain Waves/physiology [MeSH], Pattern Recognition, Visual/physiology [MeSH], Young Adult [MeSH], Gist perception, Evoked Potentials, Visual/physiology [MeSH], Photic Stimulation [MeSH], Multi-stimulus displays, Research Article, Young Adult, 03 medical and health sciences, 0302 clinical medicine, Pattern Recognition, Visual, Evoked Potentials, Visual, Humans, 0501 psychology and cognitive sciences, Photic Stimulation |
| Beschreibung: | Gist perception refers to perceiving the substance or general meaning of a scene. To investigate its neuronal mechanisms, we used the steady-state visually evoked potential (SSVEP) method—an evoked oscillatory cortical response at the same frequency as a visual stimulus flickered at this frequency. Two neighboring stimuli were flickered at different frequencies f1 and f2, for example, a drawing of a sun on the left side of the screen flickering at 8.6 Hz and the drawing of a parasol on the right side of the screen flickering at 12 Hz. SSVEPs enabled us to separate the responses to the two distinct stimuli by extracting oscillatory brain responses at f1 and f2. Additionally, it allowed to investigate intermodulation frequencies, that is, the brain’s response at a linear combination of f1 and f2 (here at f1 + f2 = 20.6 Hz) as an indicator of processing shared aspects of the input, that is, gist perception (here: a beach scene). We recorded high-density EEG of 18 participants. Results revealed clear and separable neuronal oscillations at f1 and f2. Additionally, occipital electrodes showed increased amplitudes at the intermodulation frequency in related as compared to unrelated pairs. The increase in intermodulation frequency was associated with bilateral temporal and parietal lobe activation, probably reflecting the interaction of local object representations as a basis for activating the gist network. The study demonstrates that SSVEPs are an excellent method to unravel mechanisms underlying the processing within multi-stimulus displays in the context of gist perception. |
| Publikationsart: | Article Other literature type |
| Sprache: | English |
| ISSN: | 1432-1106 0014-4819 |
| DOI: | 10.1007/s00221-020-05819-6 |
| Zugangs-URL: | https://link.springer.com/content/pdf/10.1007/s00221-020-05819-6.pdf https://pubmed.ncbi.nlm.nih.gov/32363553 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7286871 https://link.springer.com/content/pdf/10.1007/s00221-020-05819-6.pdf https://link.springer.com/article/10.1007/s00221-020-05819-6 https://repository.publisso.de/resource/frl:6469206 |
| Rights: | CC BY |
| Dokumentencode: | edsair.doi.dedup.....25d1f4995bfde3ceb0b2fefcf03e329d |
| Datenbank: | OpenAIRE |
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Nájsť tento článok vo Web of Science | Abstract: | Gist perception refers to perceiving the substance or general meaning of a scene. To investigate its neuronal mechanisms, we used the steady-state visually evoked potential (SSVEP) method—an evoked oscillatory cortical response at the same frequency as a visual stimulus flickered at this frequency. Two neighboring stimuli were flickered at different frequencies f1 and f2, for example, a drawing of a sun on the left side of the screen flickering at 8.6 Hz and the drawing of a parasol on the right side of the screen flickering at 12 Hz. SSVEPs enabled us to separate the responses to the two distinct stimuli by extracting oscillatory brain responses at f1 and f2. Additionally, it allowed to investigate intermodulation frequencies, that is, the brain’s response at a linear combination of f1 and f2 (here at f1 + f2 = 20.6 Hz) as an indicator of processing shared aspects of the input, that is, gist perception (here: a beach scene). We recorded high-density EEG of 18 participants. Results revealed clear and separable neuronal oscillations at f1 and f2. Additionally, occipital electrodes showed increased amplitudes at the intermodulation frequency in related as compared to unrelated pairs. The increase in intermodulation frequency was associated with bilateral temporal and parietal lobe activation, probably reflecting the interaction of local object representations as a basis for activating the gist network. The study demonstrates that SSVEPs are an excellent method to unravel mechanisms underlying the processing within multi-stimulus displays in the context of gist perception. |
|---|---|
| ISSN: | 14321106 00144819 |
| DOI: | 10.1007/s00221-020-05819-6 |