SCALP TOPOGRAPHY AND ANALYSIS OF INTRACRANIAL SOURCES OF FACE-EVOKED POTENTIALS
SCALP TOPOGRAPHY AND ANALYSIS OF INTRACRANIAL SOURCES OF FACE-EVOKED POTENTIALS
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DOI：
10.1007/bf00229863
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发表时间：
1995-04-01
影响因子：
2
通讯作者：
STODIECK, SRG
中科院分区：
文献类型：
--
作者：
BOTZEL, K;SCHULZE, S;STODIECK, SRG
一些报告已经描述了诱发电位的正顶点峰在幅度和潜伏期上变化，特别是当面部图像是诱发刺激时。头皮地形和可能的潜在偶极子源的这一高峰是本报告的主题。我们向16名健康受试者提供了人脸、花朵和树叶的黑白白色照片，并记录了31个头皮电极的脑诱发电位。我们发现前面描述的较高幅度的正顶点峰值时，面临的关键刺激，但这个峰值的潜伏期是相同的（180毫秒），所有三类刺激。在后颞电极，面部波形在175 ms处显示出负峰，这在其他刺激引起的波形中仅是初步的。由于在大多数以前的报告中使用了乳突参考，因此最有可能的是，先前描述的与面部刺激相关的正顶点峰的潜伏期移位是由于与该后颞峰的相互作用。偶极子分析记录的电位的可能发生器建议枕，侧颞和颞中脑结构的顺序激活过程中的人脸的感知。
Several reports have described that a positive vertex peak of an evoked potential varied in amplitude and latency specifically when images of faces were the eliciting stimulus. The scalp topography and the possible underlying dipole sources of this peak are the subject of this report. We presented black-and-white photographs of human faces, flowers and leaves to 16 healthy subjects and recorded the evoked brain potentials from 31 scalp electrodes. We found the previously described higher amplitude of the positive vertex peak when faces were the crucial stimulus, but the latency of this peak was the same (180 ms) for all three categories of stimulus. At the posterior temporal electrodes, the face waveforms showed a negative peak at 175 ms, which was only rudimentary in the waveforms elicited by the other stimuli. Since in most previous reports a mastoid reference was used, it is most likely that the previously described latency shift of the positive vertex peak associated with face stimuli was due to the interaction with this posterior temporal peak. The dipole analysis of the possible generators of the recorded potentials suggested the sequential activation of occipital, lateral temporal and mesio-temporal brain structures during the perception of a human face.