Enhanced gamma (30-150 Hz) frequency in the human medial temporal lobe

N. Hirai, S. Uchida*, T. Maehara, Y. Okubo, H. Shimizu

*この研究の対応する著者

研究成果: Article査読

38 被引用数 (Scopus)

抄録

We performed fast Fourier transformation power spectral analysis of the electrocorticogram in human medial temporal lobe during wakeful rest in six epileptic subjects. Compared with the electrocorticogram wave in the basal temporal lobe, which showed monotonic decline of spectral power across the frequency axis, the electrocorticogram wave in the parahippocampal gyms was enhanced (or did not decline) in the gamma frequency range (30-150 Hz) in all subjects. Although it has been suggested that electrical oscillations of the hippocampus have functional roles in higher brain functions, namely learning and memory, the knowledge of hippocampal oscillations is largely limited to animal studies. The present results demonstrate that fast frequency oscillation is also present in the human medial temporal lobe, which has been reported in animal hippocampi. They also demonstrate the importance of recording very fast field potentials in human electrocorticograms. This fast oscillation is likely to play important functional roles related to learning and memory, possibly to induce long-term potentiation in the human medial temporal lobe.

本文言語English
ページ(範囲)1149-1155
ページ数7
ジャーナルNeuroscience
90
4
DOI
出版ステータスPublished - 1999 6月
外部発表はい

ASJC Scopus subject areas

  • 神経科学(全般)

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