School of Psychology, Central China Normal University, No. 152 Luoyu Street, HongShan District, Hubei 430079, Wuhan, PR China.
School of Psychology, Central China Normal University, No. 152 Luoyu Street, HongShan District, Hubei 430079, Wuhan, PR China.
Psychiatry Res Neuroimaging. 2023 Dec;336:111731. doi: 10.1016/j.pscychresns.2023.111731. Epub 2023 Oct 19.
Previous studies have found working memory (WM) advantages of the pathological smartphone use (PSU) group, but most of which were emphasized in the network-related domain. Whether the advantages can transfer to other domains has yet to be confirmed. In particular, exploring from a brain mechanism perspective is necessary. Using the classical N-back paradigm, this study selected network-related words and neutral words as materials combined with fNIRS to probe the verbal WM characteristics of the PSU group. The results showed that β in channel 3, channel 4, and channel 5 were significantly lower in the PSU group than those in the control group The analysis of the region of interest revealed that the PSU group showed significantly lower β in the l-DLPFC and frontopolar. Granger Causality results showed that functional connectivity between frontopolar and R-DLPFC for the PSU group was significantly higher than for the control group in the network word condition. These results demonstrate that the PSU group has an advantage in WM, transferring from the network-related stimulus to the neutral stimulus. The advantages of network stimulus were related to bidirectional connectivity between frontopolar and R-DLPFC. Also, the l-DLPFC and frontopolar are associated with the cross-material consistency of WM.
先前的研究发现病理性智能手机使用（PSU）组在工作记忆（WM）方面存在优势，但大多数研究都强调了与网络相关的领域。这些优势是否能够转移到其他领域尚待证实。特别是，从大脑机制的角度进行探索是必要的。本研究采用经典的 N-back 范式，选择网络相关词和中性词作为材料，结合功能性近红外光谱（fNIRS）技术，探究 PSU 组的言语 WM 特征。结果表明，PSU 组在通道 3、通道 4 和通道 5 的β值显著低于对照组。感兴趣区分析显示，在网络词条件下，PSU 组在 l-DLPFC 和额极的β值显著低于对照组。Granger 因果关系结果表明，在网络词条件下，PSU 组额极与 R-DLPFC 之间的功能连接显著高于对照组。这些结果表明，PSU 组在 WM 方面具有优势，从网络相关刺激转移到中性刺激。网络刺激的优势与额极和 R-DLPFC 之间的双向连接有关。此外，l-DLPFC 和额极与 WM 的跨材料一致性有关。
