title: Neural correlates of audiovisual integration of semantic category information.
abstract: Previous studies have found a late frontal-central audiovisual interaction during the time period about 150-220 ms post-stimulus. However, it is unclear to which process is this audiovisual interaction related: to processing of acoustical features or to classification of stimuli? To investigate this question, event-related potentials were recorded during a words-categorization task with stimuli presented in the auditory-visual modality. In the experiment, congruency of the visual and auditory stimuli was manipulated. Results showed that within the window of about 180-210 ms post-stimulus more positive values were elicited by category-congruent audiovisual stimuli than category-incongruent audiovisual stimuli. This indicates that the late frontal-central audiovisual interaction is related to audiovisual integration of semantic category information.
authors.affiliation: Key Laboratory of Cognition and Personality, Ministry of Education, Southwest University, Chongqing, China.
authors.forename: Zhonghua
authors.initials: Z
authors.lastname: Hu
authors.forename: Ruiling
authors.initials: R
authors.lastname: Zhang
authors.forename: Qinglin
authors.initials: Q
authors.lastname: Zhang
authors.forename: Qiang
authors.initials: Q
authors.lastname: Liu
authors.forename: Hong
authors.initials: H
authors.lastname: Li
mesh_terms: D000161:Acoustic Stimulation; D001307:Auditory Perception / Q000502:physiology*; D001921:Brain / Q000502:physiology*; D001931:Brain Mapping; D005071:Evoked Potentials / Q000502:physiology; D005260:Female; D006801:Humans; D009483:Neuropsychological Tests; D010775:Photic Stimulation; D011930:Reaction Time / Q000502:physiology; D012660:Semantics; D014796:Visual Perception / Q000502:physiology*; D055815:Young Adult