JP2020195719A - 筋収縮による筋音を検出可能な装置 - Google Patents
筋収縮による筋音を検出可能な装置 Download PDFInfo
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- 210000003205 muscle Anatomy 0.000 title claims abstract description 165
- 230000004118 muscle contraction Effects 0.000 title claims abstract description 19
- 230000000638 stimulation Effects 0.000 claims abstract description 59
- 230000005236 sound signal Effects 0.000 claims abstract description 37
- 238000004458 analytical method Methods 0.000 claims abstract description 21
- 238000005259 measurement Methods 0.000 claims description 23
- 230000035484 reaction time Effects 0.000 claims description 18
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- 230000003247 decreasing effect Effects 0.000 claims description 6
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- 238000001514 detection method Methods 0.000 claims 2
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- 210000000689 upper leg Anatomy 0.000 description 3
- 206010049565 Muscle fatigue Diseases 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 229910052451 lead zirconate titanate Inorganic materials 0.000 description 2
- 210000002414 leg Anatomy 0.000 description 2
- 238000002595 magnetic resonance imaging Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 210000001087 myotubule Anatomy 0.000 description 2
- 210000002027 skeletal muscle Anatomy 0.000 description 2
- 206010012289 Dementia Diseases 0.000 description 1
- 208000010428 Muscle Weakness Diseases 0.000 description 1
- 206010028372 Muscular weakness Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
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- HFGPZNIAWCZYJU-UHFFFAOYSA-N lead zirconate titanate Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ti+4].[Zr+4].[Pb+2] HFGPZNIAWCZYJU-UHFFFAOYSA-N 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
- A61B5/11—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B7/00—Instruments for auscultation
- A61B7/02—Stethoscopes
- A61B7/04—Electric stethoscopes
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N1/00—Electrotherapy; Circuits therefor
- A61N1/18—Applying electric currents by contact electrodes
- A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
- A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
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Abstract
Description
各電気刺激信号に対する筋音信号の最大値(山として最も高いピークPAの波高値)の各々1秒間分を平均すると、図6(a)の時点では0.020V、図6(b)の時点では0.015V、図6(c)の時点では0.012Vとなり、次第に減少しており、筋収縮振幅が低下している。
11 電極
12 筋音センサ
13 電気刺激信号供給部
14、15 信号入力部
16 解析部
18 表示部
20 制御部
Claims (10)
- 電気的な刺激を筋肉に与えて筋収縮による筋音を検出可能な装置であって、
電気的な刺激信号を与えた測定対象の筋肉において発生した筋音に応じた筋音信号を受信する入力手段と、
前記刺激信号を与えた時点から前記筋音信号のピークを受信した時点までの反応時間または該ピークの波高値に基づいて前記筋肉の状態を評価する解析手段と、
を備える、前記装置。 - 前記測定対象に装着する電極と、
前記電極に接続され、前記刺激信号を供給可能な信号供給手段と、
前記入力手段に接続され、前記筋肉の筋音を検出して前記筋音信号を該入力手段に出力する検出手段と、
前記信号供給手段に接続され、前記刺激信号を供給するタイミングを制御する制御手段と、を更に備える、請求項1記載の装置。 - 前記検出手段は、音響センサ、加速度センサおよびレーザ距離計のいずれかである、請求項2記載の装置。
- 前記解析手段は、前記刺激信号を与えた時点から最初に受信する前記測定対象の速筋の筋収縮に対応する第1の筋音信号部分と、該第1の筋音信号部分よりも後に受信する前記測定対象の遅筋の筋収縮に対応する該第1の筋音信号部分よりもなだらかな変化を示す第2の筋音信号部分とを解析する、請求項1〜3のうちいずれか一項記載の装置。
- 前記解析手段は、前記第1の筋音信号部分のピークと前記第2の筋音信号部分のピークとの波高値または前記反応時間に基づいて筋組成を判定する、請求項4記載の装置。
- 前記解析手段は、前記第1の筋音信号部分において、前記反応時間の短い第1のピークと該第1のピークよりも反応時間の長い第2のピークとの波高値の比率または該第1および第2のピークの各々の反応時間に基づいて速筋の筋組成を判定する、請求項4または5記載の装置。
- 前記第1の筋音信号部分の前記反応時間は請求項4〜6のうちいずれか一項記載の装置。
- 前記解析手段は、前記刺激信号を所定の間隔で連続的に与えた前記測定対象の筋肉から並行して取得した前記筋音信号の平均値、各刺激信号に対する前記筋音信号のピークの波高値、または各刺激信号に対する前記筋音信号の最大値と最小値との差の平均値の経時的な変化に基づいて前記筋肉のウォーミングアップ効果または疲労度を評価する、請求項1〜7のうちいずれか一項記載の装置。
- 前記解析手段は、前記筋音信号の前記経時的な変化が増加している場合は前記ウォーミングアップ効果が表れていると判定する、請求項8記載の装置。
- 前記解析手段は、前記筋音信号の前記経時的な変化が減少している場合は疲労度が増加していると判定する、請求項8記載の装置。
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PCT/JP2019/045481 WO2020246058A1 (ja) | 2019-06-05 | 2019-11-20 | 筋収縮による筋音を検出可能な装置 |
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Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004141223A (ja) * | 2002-10-22 | 2004-05-20 | Tanita Corp | 筋肉測定装置 |
JP2015066401A (ja) * | 2013-10-01 | 2015-04-13 | 公益財団法人ヒューマンサイエンス振興財団 | 興奮収縮連関の障害の有無の判定補助方法 |
JP2017217443A (ja) * | 2016-06-07 | 2017-12-14 | 学校法人梅村学園 | 筋状態測定シート |
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- 2019-06-05 JP JP2019105299A patent/JP7288663B2/ja active Active
- 2019-11-20 WO PCT/JP2019/045481 patent/WO2020246058A1/ja active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004141223A (ja) * | 2002-10-22 | 2004-05-20 | Tanita Corp | 筋肉測定装置 |
JP2015066401A (ja) * | 2013-10-01 | 2015-04-13 | 公益財団法人ヒューマンサイエンス振興財団 | 興奮収縮連関の障害の有無の判定補助方法 |
JP2017217443A (ja) * | 2016-06-07 | 2017-12-14 | 学校法人梅村学園 | 筋状態測定シート |
Non-Patent Citations (3)
Title |
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EMILIANO CE, ET AL.: "Changes in the electromechanical delay components during a fatiguing stimulation in human skeletal m", EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY, vol. 117, no. 1, JPN6020003156, January 2017 (2017-01-01), pages 95 - 107, XP036151240, ISSN: 0004958626, DOI: 10.1007/s00421-016-3502-z * |
UCHIYAMA, T., ET AL.: "System Identification of Mechanomyograms Detected with an Acceleration Sensor and a Laser Displaceme", 33RD ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE EMBS, JPN6020003158, 30 August 2011 (2011-08-30), pages 7131 - 7134, XP032320369, ISSN: 0004958627, DOI: 10.1109/IEMBS.2011.6091802 * |
竹井裕介, 他: "筋肉電気刺激&筋活動モニタリング可能なウェアラブルデバイス", 第32回エレクトロニクス実装学会講演大会講演論文集(CD-ROM), JPN6020003153, 6 March 2018 (2018-03-06), pages 188, ISSN: 0004958625 * |
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