Xiang Ming-Qiang, Lin Long-, Song Yun-Ting, Hu Min, Hou Xiao-Hui
School of Sport and Health, Guangzhou Sport University, Guangzhou, China.
Guangdong Key Lab of Physical Activity and Health Promotion, Guangzhou Sport University, Guangzhou, China.
Front Psychiatry. 2023 Jan 9;13:1097375. doi: 10.3389/fpsyt.2022.1097375. eCollection 2022.
The widespread use of smartphones has triggered concern over problematic smartphone use (PSPU), as well as the need to elucidate its underlying mechanisms. However, the correlation between cortical activation and deficient inhibitory control in PSPU remains unclear.
This study examined inhibitory control using the color-word matching Stroop task and its cortical-activation responses using functional near-infrared spectroscopy (fNIRS) in college students with PSPU ( = 56) compared with a control group ( = 54).
At the behavioral level, Stroop interference, coupled with reaction time, was significantly greater in the PSPU group than in the control group. Changes in oxygenated hemoglobin (Oxy-Hb) signals associated with Stroop interference were significantly increased in the left ventrolateral prefrontal cortex, left frontopolar area, and bilateral dorsolateral prefrontal cortex (DLPFC). Moreover, the PSPU group had lower Oxy-Hb signal changes associated with Stroop interference in the left-DLPFC, relative to controls.
These results provide first behavioral and neuroscientific evidence using event-related fNIRS method, to our knowledge, that college students with PSPU may have a deficit in inhibitory control associated with lower cortical activation in the left-DLPFC.
智能手机的广泛使用引发了对问题性智能手机使用（PSPU）的关注，以及阐明其潜在机制的必要性。然而，PSPU中皮层激活与抑制控制缺陷之间的相关性仍不清楚。
本研究使用颜色-单词匹配斯特鲁普任务检查了抑制控制，并使用功能近红外光谱（fNIRS）研究了PSPU大学生（n = 56）与对照组（n = 54）相比的皮层激活反应。
在行为水平上，PSPU组的斯特鲁普干扰以及反应时间显著大于对照组。与斯特鲁普干扰相关的氧合血红蛋白（Oxy-Hb）信号变化在左腹外侧前额叶皮层、左额极区和双侧背外侧前额叶皮层（DLPFC）显著增加。此外，相对于对照组，PSPU组在左DLPFC中与斯特鲁普干扰相关的Oxy-Hb信号变化较低。
据我们所知，这些结果首次使用事件相关fNIRS方法提供了行为和神经科学证据，表明患有PSPU的大学生可能存在抑制控制缺陷，且与左DLPFC中较低的皮层激活有关。
