Neuroscience 2001 Abstract
| Presentation Number: | 76.9 |
|---|---|
| Abstract Title: | Practice Dependent Changes in Cortical Activation Revealed by Functional MRI. |
| Authors: |
Jantzen, K.*1
; Steinberg, F.1
; Kelso, J. A. S.1
1Center for Complex Systems and Brain Sciences, Florida Atlantic University, Boca Raton, FL |
| Primary Theme and Topics |
Cognition and Behavior - Human Cognition and Behavior -- Learning and memory |
| Session: |
76. Human cognition and behavior: learning and memory IV Poster |
| Presentation Time: | Sunday, November 11, 2001 8:00 AM-9:00 AM |
| Location: | Exhibit Hall RR-28 |
| Keywords: | attention, learning, coordination, motor planning |
It is now well established behaviorally that syncopation (moving antiphase to a pacing stimulus) is intrinsically less stable and requires more attention than inphase synchronization. Recent fMRI results have shown that, relative to synchronization, syncopation results in significant increases in activation of cortical and subcortical areas involved in planning, preparation and timing. We investigated the degree to which this increased activation is altered by practice. Baseline levels of the BOLD response were obtained from eight subjects while they syncopated or synchronized with an auditory metronome at 1.25 Hz. Subjects then practiced syncopation at the same rate while fMR images were acquired continuously. Post practice scans of the two coordination modes were then performed.
Before practice, baseline syncopation was associated with significantly greater activation than synchronization in SMA, pre-motor cortices and cerebellum, reflecting the extra planning and timing requirements of syncopation. Activity in auditory cortex was also increased suggesting that syncopation requires enhanced auditory processing possibly due to differential attention demands. After practice syncopation-synchronization differences were no longer observed. This resulted from a decrease in activation FOR syncopation whereas synchronization showed no change from baseline levels. Our results indicate that a reduction in neural activation occurs as behavior becomes more automated. Additional analyses showed that progressive reductions or removal of initially active areas are associated with performance improvements in individuals.
Before practice, baseline syncopation was associated with significantly greater activation than synchronization in SMA, pre-motor cortices and cerebellum, reflecting the extra planning and timing requirements of syncopation. Activity in auditory cortex was also increased suggesting that syncopation requires enhanced auditory processing possibly due to differential attention demands. After practice syncopation-synchronization differences were no longer observed. This resulted from a decrease in activation FOR syncopation whereas synchronization showed no change from baseline levels. Our results indicate that a reduction in neural activation occurs as behavior becomes more automated. Additional analyses showed that progressive reductions or removal of initially active areas are associated with performance improvements in individuals.
Supported by NIMH grants MH42900, MH19116 and the FAU foundation
Sample Citation:
[Authors]. [Abstract Title]. Program No. XXX.XX. 2001 Neuroscience Meeting Planner. San Diego, CA: Society for Neuroscience, 2001. Online.
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