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Brain activity in the prefrontal cortex during a cancellation task: effects of the target-to-distractor ratio
Experimental Brain Research ( IF 2 ) Pub Date : 2021-07-21 , DOI: 10.1007/s00221-021-06177-7
Koji Yano 1, 2 , Akira Yasumura 3
Affiliation  

Cancellation tasks have been widely used to neurologically assess selective attention and visual search in various clinical and research settings. However, there is still a lack of evidence regarding the effect of the level of task difficulty on brain activity in the prefrontal cortex (PFC). This study implemented cancellation tasks to investigate the effects of varying task difficulty on oxygenated hemoglobin (oxy-Hb) concentrations. Data from 21 healthy adults were analyzed based on performance during three-block-design types of cancellation tasks with different T/D ratios (i.e., 1/9, 2/8, and 3/7). Performance was assessed via the number of correct responses, incorrect responses, hit ratios, achievement ratios, and performance scores (PS), while PFC activity was examined using near-infrared spectroscopy. Both the numbers of correct responses and PS were the lowest for the smallest T/D ratio. Similarly, we observed that the oxy-Hb concentration in the PFC was significantly increased during the task. Our results support the findings of previous studies that used conventional cancellation tasks, thus suggesting that block design types are suitable for examinations in the same contexts. Regarding the above-mentioned changes in the oxy-Hb concentration, the findings suggest that the PFC region is involved in selective attention.



中文翻译:

取消任务期间前额叶皮层的大脑活动:目标与干扰器比率的影响

取消任务已广泛用于神经学评估各种临床和研究环境中的选择性注意和视觉搜索。然而,仍然缺乏关于任务难度水平对前额叶皮层 (PFC) 大脑活动影响的证据。本研究实施取消任务以研究不同任务难度对氧合血红蛋白 (oxy-Hb) 浓度的影响。基于在具有不同 T/D 比率(即 1/9、2/8 和 3/7)的三块设计类型的取消任务期间的表现,分析了来自 21 名健康成年人的数据。通过正确响应、错误响应、命中率、成就率和性能得分 (PS) 的数量评估性能,而使用近红外光谱检查 PFC 活性。T / D比率。同样,我们观察到 PFC 中的 oxy-Hb 浓度在任务期间显着增加。我们的结果支持以前使用传统取消任务的研究结果,因此表明块设计类型适用于相同上下文中的检查。关于 oxy-Hb 浓度的上述变化,研究结果表明 PFC 区域参与了选择性注意。

更新日期:2021-07-22
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