Temporal dynamics of repetition suppression to individual faces presented at a fast periodic rate
| Autor: | Corentin Jacques, Dan Nemrodov, Bruno Rossion |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Adult
Male medicine.medical_specialty Visual perception Time Factors genetic structures Stimulation Audiology Functional Laterality Young Adult Discrimination Psychological Face perception Physiology (medical) medicine Humans Evoked potential Communication Brain Mapping Repetition (rhetorical device) Fourier Analysis business.industry General Neuroscience Stimulus onset asynchrony Electroencephalography Middle Aged Temporal Lobe Electrophysiology Neuropsychology and Physiological Psychology medicine.anatomical_structure Nonlinear Dynamics Pattern Recognition Visual Scalp Face Evoked Potentials Visual Female business Psychology Photic Stimulation |
| Zdroj: | International journal of psychophysiology : official journal of the International Organization of Psychophysiology. 98(1) |
| ISSN: | 1872-7697 |
| Popis: | Periodic presentation of visual stimuli leads to a robust electrophysiological response on the human scalp exactly at the periodic stimulation frequency, a response defined as a “steady-state visual evoked potential” (SSVEP, Regan, 1966). However, recent studies have shown that SSVEPs over the (right) occipito-temporal cortex are reduced when the same individual face is repeated at periodic rates of 3 to 9 Hz compared to when different faces are presented (Rossion, 2014). Here, we characterized the temporal dynamics of this repetition suppression effect. We presented different face identities at a rate of 5.88 Hz (stimulus onset asynchrony of 170 ms) for 15 s, followed by the repetition of the exact same face at this rate for 35 s. Compared to a stimulation sequence with different faces only, there was a large and specific decrease of the 5.88 Hz response when the same face was repeated at that rate. This effect was observed over the left and right occipito-temporal cortex, but not over medial occipital electrode sites where SSVEPs are typically measured. In the right hemisphere, this decrease occurred abruptly, i.e., within half a second following the introduction of the same-identity stimulation, with no further decrease until the end of the stimulation. These observations indicate that the SSVEP recorded over high-level visual areas to periodic stimulation is not steady but rather adapts immediately and fully following the repetition of the same individual face, supporting a bottom-up, stimulus-driven account of repetition suppression effects. |
| Databáze: | OpenAIRE |
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