Neuroscience 2001 Abstract
| Presentation Number: | 950.1 |
|---|---|
| Abstract Title: | MODALITY INDEPENDENT BRAIN ACTIVATION IN SYNCOPATION REVEALED BY FUNCTIONAL MRI: A ROLE FOR INSULAR CORTEX? |
| Authors: |
Tuller, B.*1
; Jantzen, K. J.1
; Dedominicis, G.1
; Steinberg, F.1
; Nash, A.1
; Kelso, J. A. S.1
1Complex Systems and Brain Sciences, Florida Atlantic University, Boca Raton, FL |
| Primary Theme and Topics |
Cognition and Behavior - Human Cognition and Behavior -- Other higher functions |
| Secondary Theme and Topics | Sensory Systems<br />- Multisensory |
| Session: |
950. Human cognition and behavior: other higher functions V Poster |
| Presentation Time: | Thursday, November 15, 2001 8:00 AM-9:00 AM |
| Location: | Exhibit Hall RR-28 |
| Keywords: | sensorimotor integration, insular cortex, functional MRI, coordination |
Syncopation (movement antiphase to a pacing stimulus) has proven to engage a more distributed network of cortical and subcortical structures than does synchronization (movement in-phase with the same stimulus). In addition, the networks recruited may be modality specific. For example, left superior temporal gyrus (STG) activity occurs during auditory-motor, but not visuomotor synchronization. The present study used FMRI and behavioral measures to assess whether aspects of the neural networks for synchronization and syncopation are modality specific. A standard block design allowed us to measure levels of the BOLD response from six subjects while they syncopated or synchronized (right hand) with an auditory or visual pacer at 1.33 Hz. Behavioral results confirmed that syncopation is more variable than synchronization. FMRI revealed modality specific activation that nevertheless indexed the coordination pattern: activity in occipital cortex was greater during visuomotor syncopation than synchronization. The same pattern (syncopation > synchronization) occurred in the STG with the auditory pacer. Modality independent activation was also observed during syncopation. Insular cortex was recruited bilaterally for the auditory pacer and in the left hemisphere for the visual pacer. The insula has been previously implicated in self-paced finger movement and responds to vibratory stimulation of the finger tips. Our results underscore the paucity of information regarding the insula and suggest a modality independent role in different forms of sensorimotor integration.
Supported by NIMH Grants MH42900, MH01386, and T32-MH19116
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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