title: The automatic processing of visual information at different visual acuity levels: An ERP study.
abstract: This study investigated the subjective visual acuity by recording ERPs elicited by task-irrelevant visual changes. Optotypes stimuli were presented in the center of the visual field at three threshold levels (supra-threshold, threshold and sub-threshold) while participants were listening to stories. The results showed that neither vMMN nor P3a component was elicited by optotypes stimuli on the sub-threshold condition, whereas, vMMN was elicited under supra-threshold and threshold conditions, with no significant differences between those vMMN amplitudes of two conditions. The P3a amplitude was larger for supra-threshold condition than that for threshold condition. These data demonstrated that the emergence of vMMN could only reflect the automatic detection of orientation-changes in the supra-threshold and threshold conditions compared to the sub-threshold condition, whereas the P3a amplitude could reflect the difference in processing of supra-threshold and threshold stimuli.
authors.affiliation: Department of Forensic Science, Soochow University, 215021 Suzhou, China.
authors.forename: Huanhuan
authors.initials: H
authors.lastname: Meng
authors.affiliation: Department of Forensic Science, Soochow University, 215021 Suzhou, China.
authors.forename: Mengmeng
authors.initials: M
authors.lastname: Ji
authors.affiliation: Department of Forensic Science, Soochow University, 215021 Suzhou, China.
authors.forename: Bin
authors.initials: B
authors.lastname: Luo
authors.affiliation: Department of Forensic Science, Soochow University, 215021 Suzhou, China.
authors.forename: Mingyang
authors.initials: M
authors.lastname: Zhang
authors.affiliation: Department of Forensic Science, Soochow University, 215021 Suzhou, China.
authors.forename: Yuan
authors.initials: Y
authors.lastname: Gao
authors.affiliation: Department of Forensic Science, Soochow University, 215021 Suzhou, China.
authors.forename: Lu
authors.initials: L
authors.lastname: Ma
authors.affiliation: Department of Forensic Science, Soochow University, 215021 Suzhou, China.
authors.forename: Xi
authors.initials: X
authors.lastname: Shen
authors.affiliation: Department of Forensic Science, Soochow University, 215021 Suzhou, China.
authors.forename: Chengliang
authors.initials: C
authors.lastname: Luo
authors.affiliation: Lixiang Eye Hospital of Soochow University, 215021 Suzhou, China.
authors.forename: Xun
authors.initials: X
authors.lastname: Yang
authors.affiliation: Department of Forensic Science, Soochow University, 215021 Suzhou, China.
authors.forename: Xiping
authors.initials: X
authors.lastname: Chen
authors.affiliation: Department of Forensic Science, Soochow University, 215021 Suzhou, China. Electronic address: taoluyang@suda.edu.cn.
authors.forename: Luyang
authors.initials: L
authors.lastname: Tao
mesh_terms: D000161:Acoustic Stimulation; D000328:Adult; D000704:Analysis of Variance; D001288:Attention; D001931:Brain Mapping; D002540:Cerebral Cortex / Q000502:physiology*; D003265:Contingent Negative Variation / Q000502:physiology*; D004569:Electroencephalography; D005074:Evoked Potentials, Visual / Q000502:physiology*; D005260:Female; D007839:Functional Laterality; D006801:Humans; D008297:Male; D010812:Physical Stimulation; D011930:Reaction Time; D012684:Sensory Thresholds / Q000502:physiology; D014792:Visual Acuity / Q000502:physiology*; D014794:Visual Fields / Q000502:physiology*; D055815:Young Adult
keywords: Event related potentials; P3a; Visual MMN; Visual acuity