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Effect of the number of response alternatives on brain activity in response selection
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Woo, S. H. | - |
dc.contributor.author | Lee, K. M. | - |
dc.date.accessioned | 2009-12-24T05:50:30Z | - |
dc.date.available | 2009-12-24T05:50:30Z | - |
dc.date.issued | 2006-11-10 | - |
dc.identifier.citation | Hum Brain Mapp. 2007 Oct;28(10):950-8. | en |
dc.identifier.issn | 1065-9471 (Print) | - |
dc.identifier.uri | http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=17094117 | - |
dc.identifier.uri | https://hdl.handle.net/10371/22233 | - |
dc.description.abstract | It is well-known in motor control literature that a response time (RT) increases as a logarithmic function of the number of response alternatives (NA) (Hick's law). In this study, we identified neural correlates for this relationship using event-related functional MRI and a choice finger-movement task. Behaviorally, average RTs of all subjects increased as a logarithmic function of the NA in accordance with the law. From a voxel-wise search for brain areas where the activity was correlated with NA and thence the RT, a positive correlation was found at the posterior cingulate and left superior frontal gyri, whereas a negative correlation was observed at areas in bilateral inferior parietal lobules. This differential modulation by the task context, namely, the NA available for a choice response with identical stimulus and response, indicates that these regions are involved in various aspects of response selection, intentional retrieval of motor program, or spatial expectancy. | en |
dc.language.iso | en | - |
dc.publisher | Wiley-Blackwell | en |
dc.subject | Adult | en |
dc.subject | Brain Mapping | en |
dc.subject | Cerebral Cortex/anatomy & histology/*physiology | en |
dc.subject | Cognition/*physiology | en |
dc.subject | Cues | en |
dc.subject | Decision Making/*physiology | en |
dc.subject | Evoked Potentials/*physiology | en |
dc.subject | Female | en |
dc.subject | Functional Laterality/physiology | en |
dc.subject | Gyrus Cinguli/anatomy & histology/physiology | en |
dc.subject | Humans | en |
dc.subject | Information Theory | en |
dc.subject | Magnetic Resonance Imaging | en |
dc.subject | Male | en |
dc.subject | Neuropsychological Tests | en |
dc.subject | Parietal Lobe/anatomy & histology/physiology | en |
dc.subject | Photic Stimulation | en |
dc.subject | Prefrontal Cortex/anatomy & histology/physiology | en |
dc.subject | Psychomotor Performance/*physiology | en |
dc.subject | Reaction Time/*physiology | en |
dc.subject | Temporal Lobe/anatomy & histology/physiology | en |
dc.subject | Time Factors | en |
dc.subject | Visual Cortex/anatomy & histology/physiology | en |
dc.title | Effect of the number of response alternatives on brain activity in response selection | en |
dc.type | Article | en |
dc.contributor.AlternativeAuthor | 우성호 | - |
dc.contributor.AlternativeAuthor | 이경민 | - |
dc.identifier.doi | 10.1002/hbm.20317 | - |
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