title: Neural repetition suppression reflects fulfilled perceptual expectations.
abstract: Stimulus-evoked neural activity is attenuated on stimulus repetition (repetition suppression), a phenomenon that is attributed to largely automatic processes in sensory neurons. By manipulating the likelihood of stimulus repetition, we found that repetition suppression in the human brain was reduced when stimulus repetitions were improbable (and thus, unexpected). Our data suggest that repetition suppression reflects a relative reduction in top-down perceptual 'prediction error' when processing an expected, compared with an unexpected, stimulus.
authors.affiliation: INSERM U742, Université Pierre et Marie Currie, 9 Quai St. Bernard, 75005 Paris, France.
authors.forename: Christopher
authors.initials: C
authors.lastname: Summerfield
authors.forename: Emily H
authors.initials: EH
authors.lastname: Trittschuh
authors.forename: Jim M
authors.initials: JM
authors.lastname: Monti
authors.forename: M Marsel
authors.initials: MM
authors.lastname: Mesulam
authors.forename: Tobias
authors.initials: T
authors.lastname: Egner
mesh_terms: D000328:Adult; D001921:Brain / Q000098:blood supply / Q000502:physiology*; D001931:Brain Mapping; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods; D016013:Likelihood Functions; D008279:Magnetic Resonance Imaging / Q000379:methods; D008297:Male; D010100:Oxygen / Q000097:blood; D010364:Pattern Recognition, Visual / Q000502:physiology*; D010775:Photic Stimulation / Q000379:methods; D011930:Reaction Time / Q000502:physiology; D012094:Repression, Psychology; D013997:Time Factors; D055815:Young Adult
chemical_list: D010100:Oxygen