Neuroscience 2000 Abstract
| Presentation Number: | 836.4 |
|---|---|
| Abstract Title: | Components of the neural network underlying the stroop task in the elderly as assessed by fMRI. |
| Authors: |
Banich, M.*2
; Milham, M.1
; Erickson, K.1
; Wzsalek, T.1
; Webb, A.1
; Kramer, A.1
; Cohen, N.1
; Barad, V.1
; Atchley, R.3
1Univ of Illinois, Urbana, IL 2Univ of Colorado, Boulder, CO 3Univ of Kansas, Lawrence, KS |
| Primary Theme and Topics |
I. Neural Basis of Behavior - 104. Cognition: attention |
| Secondary Theme and Topics | J. Disorders of the Nervous System and Aging<br />- 148. Aging |
| Session: |
836. Cognition: attention II Poster |
| Presentation Time: | Thursday, November 9, 2000 11:00 AM-12:00 PM |
| Location: | Hall G-J |
| Keywords: | AGING* [AGEING], ATTENTION, FRONTAL**, IMAGING |
To investigate changes in attentional control in the elderly, we used fMRI to examine patterns of neural activity during the color-word Stroop task. Elderly participants used a 3-button response pad to identify a word's ink color. They received 8 blocks of neutral trials (e.g., “late” in red ink) alternating with blocks composed of 50% neutral and 50% incongruent trials (“red” in blue ink), and blocks composed of 50% neutral and 50% congruent trials (“red” in red ink). We collected 400 EPI images (1.5T GE Signa scanner, TR=1517 ms, flip angle=90°, voxel size 3.75x3.75x7 mm). Regression analyses identified regions active 1) when there are two sources of color information (in the ink color & in the word) that must be disambiguated (as in congruent & incongruent trials) and 2) when there are conflicting sources of color information (as in incongruent trials). Consistent with our prior results in young adults (Banich et al., 1999, SFN Abstr. 865.3), regions activated when there are two sources of color information included dorsolateral prefrontal (BA 9 & 46) and inferior parietal regions (BA 7). In the elderly, however, activation also extended into other prefrontal regions (e.g., BA 44 & 8). When there were conflicting sources of color information, the elderly activated a much smaller region of the anterior cingulate/SMA, inferior frontal gyrus (BA 45) and insula than young adults. These results suggest that prefrontal mechanisms associated with the selection of task-relevant information are engaged by the elderly, but in a differential manner from the young.
Supported by The Beckman Institue & Carle Clinic
Sample Citation:
[Authors]. [Abstract Title]. Program No. XXX.XX. 2000 Neuroscience Meeting Planner. New Orleans, LA: Society for Neuroscience, 2000. Online.
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