Modulation of Steady-State Visually Evoked Fields by Emotions

DOI Web Site
  • TANAKA Keita
    Department of Science and Engineering, Tokyo Denki University
  • ARAKI Toru
    Department of Science and Engineering, Tokyo Denki University
  • KATAYAMA Syota
    Department of Science and Engineering, Tokyo Denki University
  • KURIKI Shinya
    The Research Institute for Science and Technologies, Tokyo Denki University
  • UCHIKAWA Yoshinori
    Department of Science and Engineering, Tokyo Denki University

Bibliographic Information

Other Title
  • 情動に伴う脳磁界視覚誘発定常応答の変調
  • ジョウドウ ニ トモナウ ノウ ジカイ シカク ユウハツ テイジョウ オウトウ ノ ヘンチョウ

Search this article

Abstract

Steady-state visually evoked potentials/fields (SSVEPs/SSVEFs) has been shown to be useful for many paradigms in cognitive (visual attention, working memory, and brain rhythms) and clinical neuroscience (aging, stress, and neurodegenerative disorders). The aim of this study was to examine the SSVEFs associated with the processing of positive and negative impression images. We used the International Affective Picture System (IAPS) which is increasingly used in brain imaging studies to examine emotional processes. Their images also allow valence to be systematically investigated. Seventy-five IAPS images of positive, neutral and negative valence assessed by subjects prior to the magnetoencephalogram (MEG) measurement were used. The peripheral square, i. e., frame, of the image was flickered black and white at 15 Hz while the image was kept stationary. Those images were randomly presented for 2.0 s on screen set at 120 cm in front of the subject. Ten healthy subjects participated. MEG recordings were made with a 122-channel whole-head MEG system in a magnetically shielded room. The MEG signals were bandpass filtered from 0.03 to 100 Hz and sampled at 1000 Hz. At least 50 epochs were recorded for averaging. We made multi-dipole estimation of the averaged MEG signals and obtained the amplitude of souse waveform in 15 Hz component (using a bandpass filter at 14-16 Hz) of SSVEF in occipital area. The amplitude of the SSVEF source in the occipital area was larger in the negative impression images than the positive impression images (p < 0.05). This result suggests that the amplitude of SSVEF that originated from the surrounding field of visual object was modulated by the emotional object and that the SSVEF could be a measure of emotion of subjects.

Journal

Related Projects

See more

Keywords

Details 詳細情報について

Report a problem

Back to top