Neuroscience 2001 Abstract
| Presentation Number: | 417.5 |
|---|---|
| Abstract Title: | A Functional MRI Study of Attentional Conflict using a Parametric Version of the Flanker Task with Children and Adults. |
| Authors: |
Casey, B. J.*1
; Martinez, A.1
; Durston, S.1
; Kalbfleisch, M. L.1
; Thomas, K. M.1
1Weill Med Coll Cornell Univ, New York, NY |
| Primary Theme and Topics |
Cognition and Behavior - Human Cognition and Behavior -- Attention |
| Session: |
417. Human cognition and behavior: attention III Poster |
| Presentation Time: | Monday, November 12, 2001 1:00 PM-2:00 PM |
| Location: | Exhibit Hall TT-46 |
| Keywords: | Anterior Cingulate, Prefrontal Cortex, Development, Neuroimaging |
This study examines the cognitive and neural systems involved in attentional conflict and their development using functional magnetic resonance imaging. Attentional conflict was manipulated by presenting compatible (> > >) or incompatible (> < >) flankers on either side of a target stimulus. Subjects were instructed to press the right button if the center arrow pointed right (>) and the left button if the center arrow pointed left (<). The salience of flankers was manipulated by parametrically varying the number of compatible trials preceding an incompatible trial by 1, 3 or 5. Eight subjects (4 female) were scanned using a rapid mixed trial design during performance of the task. Adults and children were faster on compatible (518 and 678 msec) than incompatible trials (580 and 786 msec). Reaction times and activity in the anterior cingulate and dorsolateral prefrontal cortex increased for incompatible trials as a function of preceding context (1, 3, or 5 compatible trials) for the adults. Children showed linear increases in reaction time and increased activity in the anterior cingulate during these trials, but differed in prefrontal activity. Our findings are consistent with previous studies (1, 2, 3) in that prior context significantly impacts the degree of attentional conflict as reflected by increased reaction time that parallels increases in prefrontal and anterior cingulate activity. The developmental findings suggest a possible delay in prefrontal function.
References:
1. Gratton et al. 1992 J Exp Psychol.
2. Casey et al. 2000 PNAS.
3. Botvinick et al. 1999 Nature.
References:
1. Gratton et al. 1992 J Exp Psychol.
2. Casey et al. 2000 PNAS.
3. Botvinick et al. 1999 Nature.
Supported by 1K01MH01297 and P50MH62196 grants to BJC
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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