Journal
JOURNAL OF THE NEUROLOGICAL SCIENCES
Volume 318, Issue 1-2, Pages 135-139Publisher
ELSEVIER
DOI: 10.1016/j.jns.2012.02.032
Keywords
Functional magnetic resonance imaging; Problem solving; Posterior cingulate cortex; Deactivation
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Funding
- National Natural Science Foundation of China [60875075, 81000606]
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Purpose: To explore the blood oxygen level dependent (BOLD) response in the posterior cingulate cortex (PCC) and the adjacent precuneus regions in healthy elderly adults during problem solving tasks. Materials and Methods: Eighteen participants (7 women, mean age of 63.6 +/- 6.0 years old) were analyzed. The functional magnetic resonance imaging (fMRI) tasks were simplified 4 x 4 Sudoku puzzles that were divided into simple tasks (using the row rule or the column rule to solve the puzzle) and complex tasks (using both the row and column rules to solve the puzzle). Results: The mean accuracy on the simple task was higher than that on the complex task (P = 0.04); the reaction time on the simple task was shorter than that on the complex task (P = 0.001). On both tasks, the participants showed deactivation in the bilateral PCC/precuneus regions. The extent of deactivation on the complex task was greater than that on the simple task (left: P = 0.04; right: P = 0.04). Conclusions: Healthy elderly adults showed deactivation in the bilateral PCC and precuneus regions during a problem solving task; in addition, the extent of deactivation was enhanced by increasing the difficulty of the problem solving task. (C) 2012 Elsevier B.V. All rights reserved.
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