Decoding of Imagined Rhythm from Surface Electroencephalogram

2017 Fiscal Year Final Research Report

• Project/Area Number: 16K12456
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Perceptual information processing
• Research Institution: Tokyo University of Agriculture and Technology
• Principal Investigator: Tanaka Toshihisa 東京農工大学, 工学(系)研究科(研究院), 准教授 (70360584)
• Project Period (FY): 2016-04-01 – 2018-03-31
• Keywords: 認知認知科学 / 信号処理 / 機械学習 / 音楽神経科学

Outline of Final Research Achievements

Rhythm is one element of music. In this project, to investigate neural entrainment to imagined rhythm during rhythm imagery, we recorded electroencephalogram (EEG) while subjects imagined 3 types of rhythm in the state of being presented no sound and analyzed amplitude spectra of EEG. As a result, we found that a periodic EEG response at imagined rhythm frequency was observed in the amplitude spectrum. Furthermore, we extracted features from EEG by using canonical correlation analysis (CCA) and made an experiment to distinguish among the 3 types of imagined rhythm from EEG individually. The result showed that accuracy exceeded chance level in all subjects. We found that when subjects imagined rhythm under the condition that subjects were not presented any sound, a periodic EEG response at imagined rhythm frequency was observed.

Free Research Field

神経情報学