Response-specific sources of dual-task interference in human pre-motor cortex
| Autor: | M. M. Chun, J. M. Larson, René Marois, D. Shima |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
Adult
Male Psychological refractory period Brain activity and meditation media_common.quotation_subject Central nervous system Experimental and Cognitive Psychology Stimulus (physiology) Functional Laterality Premotor cortex Arts and Humanities (miscellaneous) Parietal Lobe Perception Image Processing Computer-Assisted Reaction Time Developmental and Educational Psychology medicine Humans Attention Dominance Cerebral media_common Brain Mapping Motor Cortex Cognition General Medicine Magnetic Resonance Imaging Frontal Lobe Oxygen Refractory Period Psychological Functional imaging medicine.anatomical_structure Pattern Recognition Visual Female Nerve Net Psychology Neuroscience Color Perception Psychomotor Performance |
| Zdroj: | Psychological Research. 70:436-447 |
| ISSN: | 1430-2772 0340-0727 |
| DOI: | 10.1007/s00426-005-0022-6 |
| Popis: | It is difficult to perform two tasks at the same time. Such performance limitations are exemplified by the psychological refractory period (PRP): when participants make distinct motor responses to two stimuli presented in rapid succession, the response to the second stimulus is increasingly slowed as the time interval between the two stimuli is decreased. This impairment is thought to reflect a central limitation in selecting the appropriate response to each stimulus, but not in perceptually encoding the stimuli. In the present study, it was sought to determine which brain regions are specifically involved in response selection under dual-task conditions by contrasting fMRI brain activity measured from a response selection manipulation that increased dual-task costs, with brain activity measured from an equally demanding manipulation that affected perceptual visibility. While a number of parieto-frontal areas involved in response selection were activated by both dual-task manipulations, the dorsal pre-motor cortex, and to a lesser extent the inferior frontal cortex, were specifically engaged by the response selection manipulation. These results suggest that the pre-motor cortex is an important neural locus of response selection limitation under dual-task situations. |
| Databáze: | OpenAIRE |
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