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Dynamic changes in brain activity during prism adaptation.
- Source :
-
The Journal of neuroscience : the official journal of the Society for Neuroscience [J Neurosci] 2009 Jan 07; Vol. 29 (1), pp. 169-78. - Publication Year :
- 2009
-
Abstract
- Prism adaptation does not only induce short-term sensorimotor plasticity, but also longer-term reorganization in the neural representation of space. We used event-related fMRI to study dynamic changes in brain activity during both early and prolonged exposure to visual prisms. Participants performed a pointing task before, during, and after prism exposure. Measures of trial-by-trial pointing errors and corrections allowed parametric analyses of brain activity as a function of performance. We show that during the earliest phase of prism exposure, anterior intraparietal sulcus was primarily implicated in error detection, whereas parieto-occipital sulcus was implicated in error correction. Cerebellum activity showed progressive increases during prism exposure, in accordance with a key role for spatial realignment. This time course further suggests that the cerebellum might promote neural changes in superior temporal cortex, which was selectively activated during the later phase of prism exposure and could mediate the effects of prism adaptation on cognitive spatial representations.
- Subjects :
- Adult
Brain anatomy & histology
Brain blood supply
Female
Functional Laterality
Humans
Image Processing, Computer-Assisted methods
Magnetic Resonance Imaging methods
Male
Oxygen blood
Photic Stimulation methods
Psychomotor Performance physiology
Time Factors
Visual Perception physiology
Young Adult
Adaptation, Physiological physiology
Brain physiology
Brain Mapping
Lenses
Nonlinear Dynamics
Subjects
Details
- Language :
- English
- ISSN :
- 1529-2401
- Volume :
- 29
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- The Journal of neuroscience : the official journal of the Society for Neuroscience
- Publication Type :
- Academic Journal
- Accession number :
- 19129395
- Full Text :
- https://doi.org/10.1523/JNEUROSCI.3054-08.2009