Identification of sleep-wake rhythm from long-term measurements of biosignals

2009 Fiscal Year Final Research Report

• Project/Area Number: 20860084
• Research Category: Grant-in-Aid for Young Scientists (Start-up)
• Allocation Type: Single-year Grants
• Research Field: Measurement engineering
• Research Institution: Kisarazu National College of Technology
• Principal Investigator: SAWAGUCHI Yoshihito Kisarazu National College of Technology, 電子制御工学科, 助教 (50455119)
• Project Period (FY): 2008 – 2009
• Keywords: 計測工学 / 生物 / 生体工学 / モデル化 / 制御工学 / 部分空間同定法 / システム同定 / 脳波解析 / 睡眠解析

Research Abstract

For early detection of sleep disorders, crucial parts of identifying system of sleep-wake rhythm from long-term biosignals were studied. Firstly, a subspace identification method was applied on a two channel electroencephalogram (EEG) for sleep stage classification, assuming that the EEG is generated by a linear stochastic process. Results of 24-hours EEG analysis show the potential of this approach in estimating the sleep stage. Secondly, a midget-type biosignal recorder was developed for long-term biosignal recording during daily lives,. The target biosignals are EEG, electrocardiogram, body acceleration and ambient temperature because these signals enable us to estimate one's sleep depth and physical activities in ordinary days. The size of the device (45mm x 25mm x 65mm, 76g) is more appropriate for ambulatory recording than that of the well-known devices.

Research Products

• [Presentation] Ambulatory Bio-signal Recorder for Individualized Healthcare (2010)
  • Author(s): Yoshihito Sawaguchi
  • Organizer: First AMA-IEEE EMBS Medical Technology Conference On Individualized Healthcare
  • Place of Presentation: Renaissance Mayflower Hotel (Washington DC, USA)
  • Year and Date: 2010-03-23
• [Presentation] 携行型生体信号記録装置の開発 (2009)
  • Author(s): 久野良介・沢口義人
  • Organizer: 2009年(第5回)電気学会東京支部千葉支所研究発表会
  • Place of Presentation: 日本大学理工学部船橋校舎(千葉県船橋市)
  • Year and Date: 2009-12-12
• [Presentation] 脳波解析への部分空間同定法の適用―睡眠診断支援システムの実現を目指して― (2008)
  • Author(s): 沢口義人
  • Organizer: 第51回自動制御連合講演会
  • Place of Presentation: 山形大学工学部(山形県米沢市)
  • Year and Date: 2008-11-23
• [Presentation] 部分空間法による脳波生成モデルの同定とそのインパルス応答列を用いた睡眠時脳波の解析 (2008)
  • Author(s): 沢口義人・久野良介
  • Organizer: 生体医工学シンポジウム2008
  • Place of Presentation: 大阪大学基礎工学部(大阪府豊中市)
  • Year and Date: 2008-09-20
• [Remarks] 木更津工業高等専門学校技術振興交流会第5回医療・福祉機器分科会にて事例報告(2010年3月26日)
• [Remarks] 木更津工業高等専門学校技術振興交流会第12回テクノセンターフォーラムにてパネル展示(2010年3月9日)
• [Remarks] 木更津工業高等専門学校技術振興交流会第4回医療・福祉機器分科会にて事例報告(2009年3月27日)