title: The influence of response competition on cerebral asymmetries for processing hierarchical stimuli revealed by ERP recordings.
abstract: It is widely accepted that the left and right hemispheres differ with respect to the processing of global and local aspects of visual stimuli. Recently, behavioural experiments have shown that this processing asymmetry strongly depends on the response competition between the global and local levels of a stimulus. Here we report electrophysiological data that underline this observation. Hemispheric differences for global/local processing were mainly observed for response-incompatible stimuli and were most prominent between 320 and 400 ms after stimulus onset. These results underpin the idea that hemispheric differences are more likely to show up when a more elaborated stimulus representation is needed for triggering the response, that is, when a response conflict has to be resolved.
authors.affiliation: Cognitive Neuroscience and Neuropsychology, Department of Psychology, University of Liverpool, Eleanor Rathbone Building, Liverpool L69 7ZA, UK. petermal@liverpool.ac.uk
authors.forename: Peter
authors.initials: P
authors.lastname: Malinowski
authors.forename: Ronald
authors.initials: R
authors.lastname: Hübner
authors.forename: Andreas
authors.initials: A
authors.lastname: Keil
authors.forename: Thomas
authors.initials: T
authors.lastname: Gruber
mesh_terms: D000328:Adult; D001288:Attention / Q000502:physiology; D001931:Brain Mapping; D003071:Cognition / Q000502:physiology; D003463:Cues; D004569:Electroencephalography; D005074:Evoked Potentials, Visual / Q000502:physiology*; D005260:Female; D007839:Functional Laterality / Q000502:physiology*; D006801:Humans; D008297:Male; D009483:Neuropsychological Tests; D010364:Pattern Recognition, Visual / Q000502:physiology*; D010775:Photic Stimulation; D011930:Reaction Time / Q000502:physiology*; D014705:Verbal Behavior / Q000502:physiology; D014793:Visual Cortex / Q000502:physiology*; D014794:Visual Fields / Q000502:physiology*; D014795:Visual Pathways / Q000502:physiology*