Neuroscience 2002 Abstract
| Presentation Number: | 841.15 |
|---|---|
| Abstract Title: | SOMATOTOPIC ACTIVATION OF THE LATERAL CEREBELLUM DURING AN FMRI TYPING PARADIGM. |
| Authors: |
James, G. A.*1,4
; He, G.2,3,4
; Liu, Y.1,2,4
1Neuroscience, University of Florida, Gainesville, FL 2Psychiatry, University of Florida, Gainesville, FL 3Radiology, University of Florida, Gainesville, FL 4McKnight Brain Institute, University of Florida, Gainesville, FL |
| Primary Theme and Topics |
Sensory Systems - Tactile/Somatosensory -- Cortex imaging |
| Secondary Theme and Topics | Techniques in Neuroscience<br />- Staining, tracing and imaging techniques |
| Session: |
841. Tactile/somatosensory: cortex imaging II Poster |
| Presentation Time: | Thursday, November 7, 2002 10:00 AM-11:00 AM |
| Location: | Hall A2-B3 E-4 |
| Keywords: | MAPPING, NEUROIMAGING, FUNCTIONAL MRI, LEARNING |
A functional magnetic resonance imaging (fMRI) study was conducted to examine the role of the cerebellum in coordinating sequential typing movements. Subjects were scanned using a 3.0 Tesla MRI system with an echo-planar sequence while they performed sequential key-pressing tasks with their right index finger, all of the fingers of their right hand, or all of the fingers on both hands. We have composed a nonmagnetic (MRI compatible) keyboard system which, after testing for successful performance in the scanner, was employed for recording subjects' behavioral responses. Right index finger key-press responses at a frequency of 3 Hz elicited ipsilateral medial cerebellar activity. This focus of activity moved laterally through the right cerebellar hemisphere when all of the right hand's fingers engaged in sequential typing movements. Sequential typing movements with all fingers from both hands resulted in increasingly lateral activation of the right cerebellum in addition to activation of the corresponding left cerebellum. Moreover, a preliminary temporal analysis correlated activation of discrete cerebellar regions to the number of fingers employed in the typing task. These data support a model for a somatotopic map of the cerebellum analogous to that of the somatosensory cortex. The potential for other functional (i.e. frequency dependent) cerebellar maps and the plasticity of these maps in response to learning are aims for examination in future studies.
Sample Citation:
[Authors]. [Abstract Title]. Program No. XXX.XX. 2002 Neuroscience Meeting Planner. Orlando, FL: Society for Neuroscience, 2002. Online.
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