Abstract
Abstract In the orienting of attention paradigm, inhibition of return (IOR) refers to slowed responses to targets presented at the same location as a preceding stimulus. No consensus has yet been reached regarding the stages of information processing underlying the inhibition. We report the results of an electro-encephalogram experiment designed to examine the involvement of response inhibition in IOR. Using a cue-target design and a target-target design, we addressed the role of response inhibition in a location discrimination task. Event-related changes in beta power were measured because oscillatory beta activity has been shown to be related to motor activity. Bilaterally located sources in the primary motor cortex showed event-related beta desynchronization (ERD) both at cue and target presentation and a rebound to event-related beta synchronization (ERS) after movement execution. In both designs, IOR arose from an enhancement of beta synchrony. IOR was related to an increase of beta ERS in the target-target design and to a decrease of beta ERD in the cue-target design. These results suggest an important role of response inhibition in IOR.
Original language | English |
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Pages (from-to) | 65-75 |
Number of pages | 11 |
Journal | Journal of Cognitive Neuroscience |
Volume | 20 |
Issue number | 1 |
DOIs | |
Publication status | Published - Jan 2008 |
Keywords
- Adult
- Analysis of Variance
- Attention
- Beta Rhythm
- Cortical Synchronization
- Discrimination (Psychology)
- Evoked Potentials
- Female
- Humans
- Male
- Motor Cortex
- Neural Inhibition
- Oscillometry
- Reaction Time
- Reactive Inhibition
- Reference Values