Hirata Satoshi, Matsuda Goh, Ueno Ari, Fuwa Koki, Sugama Keiko, Kusunoki Kiyo, Fukushima Hirokata, Hiraki Kazuo, Tomonaga Masaki, Hasegawa Toshikazu
Hayashibara Biochemical Laboratories, Inc.; Great Ape Research Institute; Okayama, Japan.
Commun Integr Biol. 2011 May;4(3):321-3. doi: 10.4161/cib.4.3.14841.
The sound of one's own name is one of the most salient auditory environmental stimuli. Several studies of human brain potentials have revealed some characteristic waveforms when we hear our own names. In a recent work, we investigated event-related potentials (ERPs) in a female chimpanzee and demonstrated that the ERP pattern generated when she heard her own name differed from that generated when she heard other sounds. However, her ERPs did not exhibit a prominent positive shift around 300 ms (P3) in response to her own name, as has been repeatedly shown in studies of human ERPs. The present study collected comparative data for adult humans using basically the same procedure as that used in our previous study of the chimpanzee. These results also revealed no prominent P3 to the human subjects' own names. The lack of increased P3 is therefore likely due to our experimental protocol, in which we presented the subject's own name relatively frequently. In contrast, our results revealed prominent negativity to the subject's own name at around 500 ms in the chimpanzee and around 200 ms in human subjects. This may indicate that initial orientation to the sound of one's own name is delayed in the chimpanzee.
自己名字的声音是最突出的听觉环境刺激之一。几项关于人类脑电的研究发现，当我们听到自己的名字时会出现一些特征波形。在最近的一项研究中，我们对一只雌性黑猩猩的事件相关电位（ERP）进行了研究，结果表明，当它听到自己的名字时所产生的ERP模式与听到其他声音时不同。然而，与人类ERP研究中反复出现的情况不同，它的ERP在听到自己名字时，在300毫秒左右（P3）并未出现明显的正向偏移。本研究采用与之前黑猩猩研究基本相同的程序收集了成年人类的对比数据。这些结果也显示，人类受试者听到自己名字时没有明显的P3。因此，缺乏P3增强可能是由于我们的实验方案，即相对频繁地呈现受试者自己的名字。相比之下，我们的研究结果显示，黑猩猩在500毫秒左右、人类受试者在200毫秒左右听到自己名字时会出现明显的负向电位。这可能表明，黑猩猩对自己名字声音的初始定向有所延迟。
