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Cooperation or competition of the two hemispheres in processing characters presented at vertical midline
- Source :
- PLoS ONE, PLoS ONE, Vol 8, Iss 2, p e57421 (2013)
- Publication Year :
- 2012
-
Abstract
- Little is known about how the hemispheres interact in processing of stimuli presented at vertical midline. Processing might be mutually independent or cooperative. Here we measured target identification and visually evoked EEG potentials while stimulus streams containing two targets, T1 and T2, were either presented at vertical midline above and below fixation, or laterally, left and right. With left and right streams, potentials evoked by filler stimuli and by T2 were earlier at the right than the left visual cortex, and T2 was better identified left than right, confirming earlier results and suggesting better capabilities of the right hemisphere in this task. With streams above and below fixation, EEG potentials evoked by filler stimuli and by T2 were likewise earlier at the right than the left hemisphere, and T2 was generally identified as well as, but not better than left T2, in one target constellation even worse (T2 in lower stream preceded by T1 in upper stream). These results suggest right-hemisphere preference for this task even with stimuli at vertical midline, and no added value through hemispheric cooperation. Lacking asymmetry for T1 amidst asymmetries for filler stimuli and for T2 might indicate alternating access of the hemispheres to midline stimuli as one means of hemispheric division of labor.
- Subjects :
- Left and right
Adult
Male
Central Nervous System
medicine.medical_specialty
Consciousness
Visual System
Cognitive Neuroscience
lcsh:Medicine
Neurophysiology
Visual evoked potentials
Stimulus (physiology)
Audiology
Electroencephalography
Biology
Social and Behavioral Sciences
Brain mapping
Lateralization of brain function
Young Adult
Cognition
Neuropsychology
medicine
Reaction Time
Humans
Psychology
Attention
Right hemisphere
lcsh:Science
Dominance, Cerebral
Visual Cortex
Brain Mapping
Multidisciplinary
medicine.diagnostic_test
lcsh:R
Experimental Psychology
Sensory Systems
Visual cortex
medicine.anatomical_structure
Pattern Recognition, Visual
Evoked Potentials, Visual
lcsh:Q
Female
Sensory Perception
Visual Fields
Photic Stimulation
Research Article
Neuroscience
Subjects
Details
- ISSN :
- 19326203
- Volume :
- 8
- Issue :
- 2
- Database :
- OpenAIRE
- Journal :
- PloS one
- Accession number :
- edsair.doi.dedup.....3c044743a517f7e349121db5a1c41e87