Publications
Detailed Information
Effect of the number of response alternatives on brain activity in response selection
Cited 6 time in
Web of Science
Cited 6 time in Scopus
- Authors
- Issue Date
- 2006-11-10
- Publisher
- Wiley-Blackwell
- Citation
- Hum Brain Mapp. 2007 Oct;28(10):950-8.
- Keywords
- Adult ; Brain Mapping ; Cerebral Cortex/anatomy & histology/*physiology ; Cognition/*physiology ; Cues ; Decision Making/*physiology ; Evoked Potentials/*physiology ; Female ; Functional Laterality/physiology ; Gyrus Cinguli/anatomy & histology/physiology ; Humans ; Information Theory ; Magnetic Resonance Imaging ; Male ; Neuropsychological Tests ; Parietal Lobe/anatomy & histology/physiology ; Photic Stimulation ; Prefrontal Cortex/anatomy & histology/physiology ; Psychomotor Performance/*physiology ; Reaction Time/*physiology ; Temporal Lobe/anatomy & histology/physiology ; Time Factors ; Visual Cortex/anatomy & histology/physiology
- 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.
- ISSN
- 1065-9471 (Print)
- Language
- English
- URI
- http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=17094117
https://hdl.handle.net/10371/22233
- Files in This Item:
- There are no files associated with this item.
- Appears in Collections:
Item View & Download Count
Items in S-Space are protected by copyright, with all rights reserved, unless otherwise indicated.