Research Center of Brain and Cognitive Neuroscience, Liaoning Normal University, Dalian, P. R. China.
Key Laboratory of Brain and Cognitive Neuroscience, Liaoning Province, Dalian, P. R. China.
J Vis. 2021 Apr 1;21(4):8. doi: 10.1167/jov.21.4.8.
The role of different spatial frequency bands in threat detection has been explored extensively. However, most studies use manual responses and the results are mixed. Here, we aimed to investigate the contribution of spatial frequency information to threat detection by using three response types, including manual responses, eye movements, and reaching movements, together with a priming paradigm. The results showed that both saccade and reaching responses were significantly faster to threatening stimuli than to nonthreatening stimuli when primed by low-spatial-frequency gratings rather than by high-spatial-frequency gratings. However, the manual response times to threatening stimuli were comparable to nonthreatening stimuli, irrespective of the spatial frequency content of the primes. The findings provide clear evidence that low-spatial-frequency information can facilitate threat detection in a response-specific manner, possibly through the subcortical magnocellular pathway dedicated to processing threat-related signals, which is automatically prioritized in the oculomotor system and biases behavior.
不同空间频率带在威胁检测中的作用已经得到了广泛的研究。然而，大多数研究使用手动反应，结果不一。在这里，我们旨在通过使用三种反应类型，包括手动反应、眼动和伸手运动，以及启动范式，来研究空间频率信息对威胁检测的贡献。结果表明，当被低空间频率光栅而非高空间频率光栅启动时，扫视和伸手反应对威胁刺激的反应速度明显快于非威胁刺激。然而，无论启动刺激的空间频率内容如何，对威胁刺激的手动反应时间与非威胁刺激相当。这些发现提供了明确的证据，表明低空间频率信息可以以特定于反应的方式促进威胁检测，可能是通过专门处理与威胁相关信号的皮层下大细胞通路，该通路在眼动系统中自动优先化，并偏向行为。
