title: Hemispheric lateralization of bilaterally presented homologous visual and auditory stimuli in normal adults, normal children, and children with central auditory dysfunction.
abstract: Two experiments were conducted to examine the performance of normal adults, normal children, and children diagnosed with central auditory dysfunction presumed to involve the interhemispheric pathways on a dichotic digits test in common clinical use for the diagnosis of central auditory processing disorder (CAPD) and its corresponding visual analog. Results of the first experiment revealed a significant right ear advantage (REA) for the dichotic listening task and a left-visual-field advantage (LVFA) for the corresponding visual analog in normal adults and children. In the second experiment, results revealed a significantly larger REA in the children with CAPD as compared to the normal children. Results also revealed a reversed cerebral asymmetry (RVFA) for the children with CAPD on the visual task. Significant cross-modal correlations suggest that the two tasks may reflect, at least in part, similar interhemispheric processing mechanisms in children. Findings are discussed in relation to differential diagnosis and modality-specificity of CAPD.
authors.affiliation: Department of Communication Disorders, 414 East Clark Street, The University of South Dakota, Vermillion, SD 57069, USA. tbellis@usd.edu
authors.forename: Teri James
authors.initials: TJ
authors.lastname: Bellis
authors.forename: Cassie
authors.initials: C
authors.lastname: Billiet
authors.forename: Jody
authors.initials: J
authors.lastname: Ross
mesh_terms: D000161:Acoustic Stimulation; D000293:Adolescent; D000328:Adult; D000704:Analysis of Variance; D001304:Auditory Diseases, Central / Q000503:physiopathology*; D001306:Auditory Pathways / Q000502:physiology*; D016022:Case-Control Studies; D002648:Child; D003337:Corpus Callosum / Q000502:physiology* / Q000503:physiopathology; D004007:Dichotic Listening Tests; D004192:Discrimination, Psychological / Q000502:physiology; D005260:Female; D007839:Functional Laterality / Q000502:physiology*; D006801:Humans; D008297:Male; D010775:Photic Stimulation; D000091402:Prohibitins; D011930:Reaction Time / Q000502:physiology; D012016:Reference Values; D014794:Visual Fields / Q000502:physiology*