Related Experiment Video
Updated: May 10, 2026
05:36
Central and Divided Visual Field Presentation of Emotional Images to Measure Hemispheric Differences in Motivated Attention
Published on: November 16, 2017
Behavioral evidence for inter-hemispheric cooperation during a lexical decision task: a divided visual field
Marcela Perrone-Bertolotti1, Sophie Lemonnier, Monica Baciu
1INSERM U1028, CNRS UMR5292, Lyon Neuroscience Research Center, Brain Dynamics and Cognition Team, Université Claude Bernard Lyon 1 Lyon, France.
Frontiers in Human Neuroscience
|July 3, 2013
Summary
Bilateral visual presentation of words enhances cooperation between brain hemispheres, especially with semantic information during word processing. This interaction involves both cooperation and inhibition, depending on the processing level.
Area of Science:
- Cognitive Neuroscience
- Neuroscience
- Psycholinguistics
Background:
- Inter-hemispheric interaction (IHI) influences cognitive tasks.
- Bilateral redundant (BR) stimulus presentation reduces asymmetry and increases hemispheric cooperation compared to unilateral presentation.
- The specific information type modulating IHI during lexical processing remains unclear.
Purpose of the Study:
- To investigate how different types of information (perceptual, semantic, decisional) modulate inter-hemispheric interaction (IHI) during a lexical decision task.
- To explore the balance between hemispheric cooperation and inhibition during word processing.
- To determine which processing level is crucial for enhanced hemispheric cooperation.
Main Methods:
- Utilized a divided visual field experiment with unilateral and bilateral visual stimulus presentation.
- Employed a lexical decision task to assess word recognition.
- Manipulated target-distractor relationships during bilateral presentation to differentiate perceptual, semantic, and decisional information.
Main Results:
- Left hemisphere (LH) lateralization was observed during the lexical decision task.
- Perceptual and decisional information processing led to increased inter-hemispheric asymmetry, indicating inhibition.
- Semantic information processing decreased inter-hemispheric asymmetry, suggesting cooperation.
Conclusions:
- Cerebral hemispheres engage in complex interactions, utilizing both excitatory and inhibitory mechanisms.
- Semantic information plays a key role in facilitating cooperation between brain hemispheres during lexical processing.
- The nature of inter-hemispheric communication is dependent on specific cognitive processes and word processing levels.
