Enhancement of object detection with transcranial direct current stimulation is associated with increased attention

被引:90
|
作者
Coffman, Brian A. [1 ,3 ,4 ,5 ]
Trumbo, Michael C. [1 ,3 ]
Clark, Vincent P. [1 ,2 ,3 ,4 ,5 ]
机构
[1] Univ New Mexico, Dept Psychol, Albuquerque, NM 87131 USA
[2] Univ New Mexico, Dept Neurosci, Albuquerque, NM 87131 USA
[3] Univ New Mexico, Dept Psychol, Clin Neurosci Ctr, Albuquerque, NM 87131 USA
[4] Mind Res Network, Albuquerque, NM 87106 USA
[5] Lovelace Resp Res Inst, Albuquerque, NM 87106 USA
来源
BMC NEUROSCIENCE | 2012年 / 13卷
关键词
Learning; tDCS; Frontal Cortex; Object detection; Visual search; Brain stimulation; Attention; Alerting; Attention networks test; HUMAN MOTOR CORTEX; BRAIN POLARIZATION; NETWORK; ACTIVATION; SAFETY;
D O I
10.1186/1471-2202-13-108
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
Background: We previously found that Transcranial Direct Current Stimulation (tDCS) improves learning and performance in a task where subjects learn to detect potential threats indicated by small target objects hidden in a complex virtual environment. In the present study, we examined the hypothesis that these effects on learning and performance are related to changes in attention. The effects of tDCS were tested for three forms of attention (alerting, orienting, and executive attention) using the Attention Network Task (ANT), which were compared with performance on the object-learning task. Results: Participants received either 0.1 mA (N = 10) or 2.0 mA (N = 9) tDCS during training and were tested for performance in object-identification before training (baseline-test) and again immediately after training (immediate test). Participants next performed the Attention Networks Task (ANT), and were later tested for object-identification performance a final time (delayed test). Alerting, but not orienting or executive attention, was significantly higher for participants receiving 2.0 mA compared with 0.1 mA tDCS (p<0.02). Furthermore, alerting scores were significantly correlated with the proportion of hits (p<0.01) for participants receiving 2.0 mA. Conclusions: These results indicate that tDCS enhancement of performance in this task may be related in part to the enhancement of alerting attention, which may benefit the initial identification, learning and/or subsequent recognition of target objects indicating potential threats.
引用
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页数:8
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