Neuroscience 2004 Abstract
| Presentation Number: | 321.10 |
|---|---|
| Abstract Title: | Functional MRI reveals differential neural activity between discrete and rhythmic coordination modes. |
| Authors: |
Oullier, O.*1
; Jantzen, K. J.1
; Steinberg, F. L.1
; Kelso, J. A. S.1
1Florida Atlantic Univ, Boca Raton, FL |
| Primary Theme and Topics |
Cognition and Behavior - Human and Animal Cognition and Behavior -- Timing and temporal processing |
| Session: |
321. Human Timing Studies Poster |
| Presentation Time: | Sunday, October 24, 2004 2:00 PM-3:00 PM |
| Location: | San Diego Convention Center - Hall A-H, Board # HH17 |
| Keywords: | SENSORIMOTOR, IMAGING, BOLD, MOTOR PLANNING |
Previous imaging studies have reported differences in the neural networks supporting synchronized and syncopated sensorimotor coordination. Syncopation generates greater BOLD amplitude across a broad network that includes SMA, premotor cortex, cerebellum and basal ganglia. These regions are often ascribed roles in planning, preparation and timing leading to the hypothesis that while synchronization is carried out automatically, syncopation is planned on a movement by movement basis. This hypothesis suggests syncopated movements may be carried out in a discrete as opposed to rhythmic fashion. To investigate this at the neural level, we report here similarities and differences in the networks engaged for the performance of synchronized, syncopated and reactive movements. BOLD activity was measured while subjects (n=11) executed rhythmic or discrete sensorimotor coordination patterns. Subjects timed uni-manual finger opposition movements with respect to an auditory metronome delivered a constant rate (1.25 Hz). In the rhythmic tasks, subjects moved with each beat of the metronome (synchronization) or in between each beat (syncopation). In the discrete task, subjects were asked to react only after the occurrence of each beep (reaction). Predicted differences were observed between syncopation and synchronization. In addition, compared to the rhythmic tasks, reaction resulted in higher activity within premotor cortex, SMA, inferior parietal lobule, inferior and middle frontal gyrus, insula and thalamus. This broadly distributed network appears to be related to the additional planning and processing requirements associated with the execution of reaction tasks compared to rhythmic ones suggesting that syncopation is performed in a discrete manner.
Supported by NIMH Grants MH42900 and MH01386
Sample Citation:
[Authors]. [Abstract Title]. Program No. XXX.XX. 2004 Neuroscience Meeting Planner. San Diego, CA: Society for Neuroscience, 2004. Online.
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