Qiu Jiang, Wei Dongtao, Li Hong, Yu Caiyun, Wang Ting, Zhang Qinglin
Key Laboratory of Cognition and Personality (SWU), Ministry of Education, Chongqing, China.
Int J Psychophysiol. 2009 Oct;74(1):69-73. doi: 10.1016/j.ijpsycho.2009.07.006. Epub 2009 Jul 29.
In the present study, we provided a cue (face or vase) beforehand to make subjects attend the target stimuli in the vase-face ambiguous figure, and compared the spatiotemporal cortical activation patterns underlying face (face-face) or vase (vase-vase) processing to the ambiguous figure using high-density (64-channel) event-related brain potential (ERP) recordings. Scalp ERP analysis found that the anterior N100, P160, N320 and posterior P100 and N160 were elicited by the face-face and vase-vase responses. The results of the ANOVAs showed that the anterior N100 and N320 elicited by the vase-vase response were more negative than the face-face response. The anterior N100 might reflect deployment of attention (conscious effort) to identify the target stimuli (face or vase) in early processing of the ambiguous figure, and the N320 might be the reversal negativity (RN) and was involved in involuntary perceptual reversals (from face to vase or reverse). Moreover, the mean amplitude (a late positive component: LPC) between 350 and 450 ms of the face-face response was larger than the vase-vase response on positive orientation over the front-central scalp regions. This result might support the view that the LPC reflect post-perceptual processing and indicated that the perceptual reversal of the vase-face illusion is influenced by top-down control.
在本研究中，我们预先提供一个线索（脸或花瓶），以使受试者关注花瓶-脸双关图形中的目标刺激，并使用高密度（64通道）事件相关脑电位（ERP）记录，将脸（脸-脸）或花瓶（花瓶-花瓶）加工过程中潜在的时空皮质激活模式与双关图形进行比较。头皮ERP分析发现，脸-脸和花瓶-花瓶反应引发了前部N100、P160、N320以及后部P100和N160。方差分析结果表明，花瓶-花瓶反应引发的前部N100和N320比脸-脸反应更负向。前部N100可能反映了在双关图形早期加工过程中为识别目标刺激（脸或花瓶）而进行的注意力分配（有意识努力），而N320可能是反转负波（RN），并参与了非自愿的知觉反转（从脸到花瓶或相反）。此外，在额中央头皮区域的正向取向上，脸-脸反应在350至450毫秒之间的平均振幅（一个晚期正成分：LPC）大于花瓶-花瓶反应。这一结果可能支持LPC反映知觉后加工的观点，并表明花瓶-脸错觉的知觉反转受自上而下控制的影响。
