A Motor Programming Task Activates the Prefrontal Cortex More than a Sensitivity-to-Interference Task or an Inhibitory Control Task in Older AdultsReport as inadecuate




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The objectives of this study were to detect age-related differences in activation of the prefrontal cortex PFC during the tasks of hand motions and to determine an activity-related task type activating the PFC. PFC activation during three tasks, three subtests of the Frontal Assessment Battery FAB, was investigated in 77 healthy adults by using near-infrared spectroscopy NIRS. The tasks were a motor programming task FAB 3, a sensitivity-to-interference task FAB 4 and an inhibitory control task FAB 5. We divided participants into three age groups of Younger 20 - 39 years, Middle-aged 40 - 59 years, and Older 60 - 81 years, and compared relative changes in oxygenated hemoglobin concentration in the PFC during the tasks. The activation in the frontal pole FP and the dorsolateral prefrontal cortex DLPFC during a motor programming task and a sensitivity-to-interference task showed no main effects by age. The results indicated that they were not likely to be affected by age-related cognitive decline compared to an inhibitory control task. In addition, in the Older group, a motor programming task induced significantly greater activation than a sensitivi-ty-to-interference task at eleven channels out of twelve on which we focused p < 0.05. It was suggested that some characteristic factors included in the motor programming task such as repetition of a series of hand motions and attention to action have the potential to contribute to PFC activation in older adults. These findings provide a clue to understanding daily activities available to suppress cognitive decline of older adults by activating the PFC.

KEYWORDS

Frontal Assessment Battery FAB, Working Memory WM, Attention to Action, Cognitive Decline, Near-Infrared Spectroscopy NIRS

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Toyoda, M. , Yokota, Y. and Rodiek, S. 2016 A Motor Programming Task Activates the Prefrontal Cortex More than a Sensitivity-to-Interference Task or an Inhibitory Control Task in Older Adults. Journal of Behavioral and Brain Science, 6, 433-447. doi: 10.4236-jbbs.2016.611040.





Author: Masahiro Toyoda1*, Yuko Yokota1, Susan Rodiek2

Source: http://www.scirp.org/



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