Neuroscience 2004 Abstract
| Presentation Number: | 138.2 |
|---|---|
| Abstract Title: | Brain areas underlying instabilities in sensorimotor coordination revealed by functional magnetic resonance imaging. |
| Authors: |
Jantzen, K. J.*1
; Ouller, O.1
; Winchester, J.1
; Steinberg, F. L.1,2
; Kelso, J. A. S.1
1Ctr Complex Systems & Brain Sci, Florida Atlantic Univ, Boca Raton, FL 2FL, 777 Glades Rd, 33431, |
| Primary Theme and Topics |
Cognition and Behavior - Human and Animal Cognition and Behavior -- Timing and temporal processing |
| Secondary Theme and Topics | Sensory Systems<br />- Multisensory |
| Session: |
138. Temporal Perception and Production Slide |
| Presentation Time: | Sunday, October 24, 2004 8:15 AM-8:30 AM |
| Location: | San Diego Convention Center - Room 7B |
| Keywords: | SYNCHRONIZATION, BLOOD FLOW, BRAIN IMAGING, TIMING |
Uni-manual sensorimotor coordination performed at low movement rates is bi-stable, displaying a tendency towards either synchronization or syncopation. Under parametric increases in movement rate the syncopated pattern becomes unstable until at some critical frequency the system passes into a monostable regime and spontaneous switches to synchronized coordination ensue. Functional imaging studies have demonstrated robust differences in neural activity underlying these two coordination patterns when performed at movement rates well within the bistable regime. Such data suggest that neural networks distinguishing between coordination modes may be related to the relative differences in stability and contribute to the generation of behavioral transitions. Here we use blood oxygen level dependent (BOLD) functional magnetic resonance imaging to measure neural activity of the brain for the purpose of establishing a relationship between brain areas that distinguish between the two stable coordination patterns and behavioral instabilities revealed by increases in cycling frequency. Participants (16) pseudoramdonly performed synchronization and syncopated in the magnet at 5 frequencies ranging from 0.75 to 1.75 Hz in 0.25 Hz increments. We hypothesized that if activity within specific neural areas is related to the degree of behavioral stability, BOLD signal amplitude should increase with increasing movement rate only during syncopation and not during synchronization. Rate dependent increases in BOLD amplitude for syncopation but not synchronization were observed in SMA, bilateral premotor, right insular and cerebellar cortex. Such results support our hypothesis and when taken together with previous research, provide important insight into the central neural mechanisms underlying behavioral pattern switching.
Supported by NIMH: 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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