Effects of Stochastic Facilitation in Healthy Subjects with Different Auditory Working Memory Capacity

  • E. A. Othman Universiti Sultan Zainal Abidin
  • M. Mohamad Universiti Kebangsaan Malaysia
  • H. Abdul Manan Universiti Kebangsaan Malaysia
  • A. N. Yusoff Universiti Kebangsaan Malaysia

Abstract

This study investigated the effects of stochastic facilitation in healthy subjects with normal and low auditory working memory capacity (AWMC). Forty healthy volunteers were recruited in this study. They performed a backward recall task (BRT) in quiet and under four white noise levels: 45, 50, 55, and 60 dB. Brain activations during the task were measured using functional magnetic resonance imaging (fMRI). The behavioral performance in both groups increased significantly in 50 and 55 dB white noise. The normal AWMC group (mean score = 48.70) demonstrated higher activation in the superior temporal gyrus and prefrontal cortex than the low AWMC group (mean score = 30.85). However, comparisons in the brain activation between groups for all noise levels were not statistically different. The results support previous findings that stochastic facilitation enhances cognitive performance in healthy individuals. The results also proposed that brain activity among healthy subjects is more or less similar, at least in the context of auditory working memory. These findings indicated that there were no differential effects of stochastic facilitation in healthy subjects with different AWMC.

Author Biographies

E. A. Othman, Universiti Sultan Zainal Abidin

Department of Medical Imaging, Faculty of Health Sciences, Universiti Sultan Zainal Abidin, 21300 Kuala Terengganu, Terengganu, Malaysia

M. Mohamad, Universiti Kebangsaan Malaysia

Centre for Diagnostic, Therapeutic and Investigative Studies, Faculty of Health Science, Universiti Kebangsaan Malaysia, Jalan Raja Muda Abdul Aziz, 50300 Kuala Lumpur, Malaysia

H. Abdul Manan, Universiti Kebangsaan Malaysia

Department of Radiology, Faculty of Medicine, Universiti Kebangsaan Malaysia Medical Centre Bandar Tun Razak, Cheras, 56000 Kuala Lumpur, Malaysia

A. N. Yusoff, Universiti Kebangsaan Malaysia

Centre for Diagnostic, Therapeutic and Investigative Studies, Faculty of Health Science, Universiti Kebangsaan Malaysia, Jalan Raja Muda Abdul Aziz, 50300 Kuala Lumpur, Malaysia

Published
2021-02-10
How to Cite
OTHMAN, E. A. et al. Effects of Stochastic Facilitation in Healthy Subjects with Different Auditory Working Memory Capacity. Physics and Technology in Medicine, [S.l.], v. 1, n. 2, p. 27-31, feb. 2021. ISSN 2710-723X. Available at: <https://myjms.mohe.gov.my/index.php/ptm/article/view/11319>. Date accessed: 27 jan. 2022.
Section
Functional Neuroimaging