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首页> 外文期刊>The European Journal of Neuroscience >Modulation of neuromagnetic responses to face stimuli by preceding biographical information.
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Modulation of neuromagnetic responses to face stimuli by preceding biographical information.

机译：通过先前的传记信息对面对面部刺激的神经磁反应进行调节。

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摘要

When we encode faces in memory, we often do so in association with biographical information regarding the person. To examine the neural dynamics underlying such encoding processes, we devised a face recognition task and recorded cortical activity using magnetoencephalography. The task included two conditions. In the experimental condition, face stimuli were preceded by biographical information regarding the person whose face was to be memorized, whereas in the control condition, nonsense syllables were presented before face stimuli. Behavioral results indicated that the biographical information about a person facilitated the recognition memory of their face. Magnetoencephalography signals showed clear visually evoked magnetic fields mainly in the occipitotemporal cortex, in response to the face stimuli that were to be encoded. The phasic peak was observed at 100-200 ms after onset of a face stimulus, which was followed by late latency deflections (200-400 ms). Comparison of the signal between conditions revealed that the preceding semantic information does modulate the neuromagnetic responses to the face stimuli. This modulation occurred primarily at the late latency component in the sensors over the occipitotemporal cortex. In addition, the effects of conditions were also observed in the signals from more anterior sensors, which occurred earlier than the effects in the occipitotemporal cortex. These results provide insights into the neural dynamics underlying the encoding of faces in association with their biographical information.
机译：当我们在记忆中对人脸进行编码时，通常会与有关该人的传记信息相关联。为了检查这种编码过程背后的神经动力学，我们设计了人脸识别任务并使用脑磁图记录了皮质活动。该任务包括两个条件。在实验条件下，在面部刺激之前先记录有关要记忆面部的人的传记信息，而在对照条件下，胡说的音节在面部刺激之前出现。行为结果表明，有关一个人的传记信息有助于其面部识别记忆。脑磁图信号显示清晰的视觉诱发磁场，主要是在枕颞皮层，响应于要编码的面部刺激。在面部刺激发作后100-200 ms观察到相位峰值，随后出现延迟潜伏期偏斜（200-400 ms）。条件之间的信号比较表明，先前的语义信息确实调节了对面部刺激的神经磁响应。这种调制主要发生在枕颞皮层传感器的延迟潜伏期。此外，在来自更多前传感器的信号中也观察到了条件的影响，该信号的发生要比枕颞皮质的影响更早发生。这些结果提供了对与脸部传记信息相关联的脸部编码基础的神经动力学的见解。

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