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Prefrontal activation may predict working-memory training gain in normal aging and mild cognitive impairment

Lookup NU author(s): Dr Linda Heskamp

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This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).


Abstract

Cognitive training has been shown to result in improved behavioral performance in normal aging and mild cognitive impairment (MCI), yet little is known about the neural correlates of cognitive plasticity, or about individual differences in responsiveness to cognitive training. In this study, 21 healthy older adults and 14 patients with MCI received five weeks of adaptive computerized working-memory (WM) training. Before and after training, functional Near-Infrared Spectroscopy (fNIRS) was used to assess the hemodynamic response in left and right prefrontal cortex during performance of a verbal n-back task with varying levels of WM load. After training, healthy older adults demonstrated decreased prefrontal activation at high WM load, which may indicate increased processing efficiency. Although MCI patients showed improved behavioral performance at low WM load after training, no evidence was found for training-related changes in prefrontal activation. Whole-group analyses showed that a relatively strong hemodynamic response at low WM load was related to worse behavioral performance, while a relatively strong hemodynamic response at high WM load was related to higher training gain. Therefore, a ‘youth-like’ prefrontal activation pattern at older age may be associated with better behavioral outcome and cognitive plasticity.


Publication metadata

Author(s): Vermeij A, Kessels RPC, Heskamp L, Simons EMF, Dautzenberg PLJ, Claassen JAHR

Publication type: Article

Publication status: Published

Journal: Brain Imaging and Behavior

Year: 2019

Volume: 11

Issue: 1

Pages: 141-154

Print publication date: 01/02/2017

Online publication date: 03/02/2016

Acceptance date: 03/02/2016

Date deposited: 03/05/2019

ISSN (print): 1931-7557

ISSN (electronic): 1931-7565

Publisher: Springer

URL: https://doi.org/10.1007/s11682-016-9508-7

DOI: 10.1007/s11682-016-9508-7


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