title: Neural measures of social attention across the first years of life: characterizing typical development and markers of autism risk.
abstract: Few studies employing event-related potentials (ERPs) to examine infant perception/cognition have systematically characterized age-related changes over the first few years of life. Establishing a 'normative' template of development is important in its own right, and doing so may also better highlight points of divergence for high-risk populations of infants, such as those at elevated genetic risk for autism spectrum disorder (ASD). The present investigation explores the developmental progression of the P1, N290, P400 and Nc components for a large sample of young children between 6 and 36 months of age, addressing age-related changes in amplitude, sensitivity to familiar and unfamiliar stimuli and hemispheric lateralization. Two samples of infants are included: those at low- and high-risk for ASD. The four components of interest show differential patterns of change over time and hemispheric lateralization; however, infants at low- and high-risk for ASD do not show significant differences in patterns of neural response to faces. These results will provide a useful point of reference for future developmental cognitive neuroscience research targeting both typical development and vulnerable populations.
authors.affiliation: Department of Communication Sciences & Disorders, Emerson College, United States; Harvard Medical School/Boston Children's Hospital, United States. Electronic address: rhiannon_luyster@emerson.edu.
authors.forename: Rhiannon J
authors.initials: RJ
authors.lastname: Luyster
authors.affiliation: Clinical Research Center, Boston Children's Hospital, United States.
authors.forename: Christine
authors.initials: C
authors.lastname: Powell
authors.affiliation: Department of Psychology, Boston University, United States.
authors.forename: Helen
authors.initials: H
authors.lastname: Tager-Flusberg
authors.affiliation: Harvard Medical School/Boston Children's Hospital, United States.
authors.forename: Charles A
authors.initials: CA
authors.lastname: Nelson
mesh_terms: D000375:Aging; D001288:Attention / Q000502:physiology*; D016022:Case-Control Studies; D002657:Child Development / Q000502:physiology*; D002659:Child Development Disorders, Pervasive / Q000235:genetics / Q000473:pathology / Q000503:physiopathology* / Q000523:psychology*; D002675:Child, Preschool; D003071:Cognition / Q000502:physiology; D005071:Evoked Potentials; D005145:Face; D005260:Female; D020022:Genetic Predisposition to Disease; D006801:Humans; D007223:Infant; D008297:Male; D009474:Neurons / Q000502:physiology*; D010641:Phenotype; D010775:Photic Stimulation; D021641:Recognition, Psychology / Q000502:physiology; D012306:Risk; D012919:Social Behavior
keywords: ASD; Autism; ERP; Event-related potentials; Infancy