Face-evoked steady-state visual potentials: effects of presentation rate and face inversion.
Face-evoked steady-state visual potentials: effects of presentation rate and face inversion.
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DOI：
10.3389/fnhum.2012.00316
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发表时间：
2012
影响因子：
2.9
通讯作者：
Keil A
中科院分区：
文献类型：
--
作者：
Gruss LF;Wieser MJ;Schweinberger SR;Keil A
面部处理可以使用电生理学方法来探索。事件相关电位的研究已经证明了所谓的面部倒置效应，其中与直立面部相比，N170成分在振幅和潜伏期上增强。本研究探讨了在何种程度上重复较低级别的视觉皮层的参与，反映在闪烁稳态视觉诱发电位（ssVEPs），显示类似的幅度增强脸反转。我们还询问了反转相关的ssVEP调制是否取决于直立和倒置面部闪烁的刺激速率。为此，在两项研究（n = 21，n = 18）中使用了多种标记频率（5、10、15和20 Hz）。结果表明，振幅增强的ssVEP倒置的脸被发现只在较高的刺激频率（15和20 Hz）。相比之下，较低频率的ssVEP没有显示这种反转效应。这些发现表明，刺激频率影响ssVEP的敏感性，面对反转。
Face processing can be explored using electrophysiological methods. Research with event-related potentials has demonstrated the so-called face inversion effect, in which the N170 component is enhanced in amplitude and latency to inverted, compared to upright, faces. The present study explored the extent to which repetitive lower-level visual cortical engagement, reflected in flicker steady-state visual evoked potentials (ssVEPs), shows similar amplitude enhancement to face inversion. We also asked if inversion-related ssVEP modulation would be dependent on the stimulation rate at which upright and inverted faces were flickered. To this end, multiple tagging frequencies were used (5, 10, 15, and 20 Hz) across two studies (n = 21, n = 18). Results showed that amplitude enhancement of the ssVEP for inverted faces was found solely at higher stimulation frequencies (15 and 20 Hz). By contrast, lower frequency ssVEPs did not show this inversion effect. These findings suggest that stimulation frequency affects the sensitivity of ssVEPs to face inversion.