JP5964351B2 - 睡眠および覚醒状態の自動検出 - Google Patents
睡眠および覚醒状態の自動検出 Download PDFInfo
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Description
Claims (19)
- 脳波の活動を示すデータを取得するステップと、
前記データを周波数帯域ごとに時間で正規化し、脳波の活動を示す正規化されたデータを形成するステップと、
二重正規化されたデータを形成すべく前記データを正規化する第2の正規化ステップであって、当該第2の正規化ステップが、前記正規化されたデータを形成するステップとの組み合わせにより、少なくとも1つの周波数帯域における前記データの低出力を他の周波数帯域におけるデータの高出力に比較して増加させるために、前記正規化されたデータを時間ごとに周波数で正規化するステップを含む、第2の正規化ステップと、
脳波の活動を示す前記二重正規化されたデータを分析し、前記分析から睡眠状態を示す少なくとも1つのパラメーターを決定するステップと、
を含む方法。 - 前記分析するステップは、前記正規化されたデータを自動的にクラスタ化してクラスタにするステップと、前記分析するステップにおいて前記クラスタを使用して前記パラメーターを決定するステップとを含む、請求項1に記載の方法。
- 前記正規化するステップは、前記データのZスコアを算出するステップを含む、請求項1に記載の方法。
- 複数の異なる睡眠状態の前記二重正規化されたデータの特徴を表す判別関数を定義するステップと、前記判別関数を使用して前記二重正規化されたデータから睡眠状態を決定するステップとをさらに含む、請求項1に記載の方法。
- 任意の特定の時間において最も高い標準値を有する周波数として好ましい周波数を特徴付けるステップと、前記好ましい周波数を分析して前記少なくとも1つのパラメーターを決定するステップとをさらに含む、請求項1に記載の方法。
- 前記二重正規化されたデータのフラグメンテーションを分析するステップと、前記分析するステップの一部として前記フラグメンテーションを使用するステップとをさらに含む、請求項1に記載の方法。
- 前記正規化するステップに先立って、ソースデータを複数の時間区分に分割するステップをさらに含む、請求項1に記載の方法。
- ある期間にわたって非ヒト対象の睡眠状態を決定するための方法であって、
前記期間にわたって前記非ヒト対象の脳波データを受信するステップであって、前記脳波データは、周波数スペクトルでの第2の周波数帯域と比較して、前記周波数スペクトルでの、少なくとも1つの低出力の第1の周波数帯域において、比較的低い出力のダイナミックレンジを示す、前記脳波データを受信するステップと、
前記脳波データを1または複数の時期に分割するステップと、
前記1または複数の時期の周波数出力に重みをかけるステップであって、1または複数の周波数重み付け時期を生成するステップを含む、前記重みをかけるステップと、
第2の方向に沿って前記データを正規化するべく出力に重みをかける第2の重みをかけるステップであって、当該第2の重みをかけるステップが、前記正規化するステップとの組み合わせにより、少なくとも1つの周波数帯域における前記データの低出力を他の周波数帯域におけるデータの高出力に比較して増加させるために、二重正規化されたデータを作成すべく少なくとも1つの周波数を時間ごとに正規化するステップを含む、第2の重みをかけるステップと、
前記二重正規化されたデータに基づき前記非ヒト対象の睡眠状態を分類するステップと、
を含む方法。 - 前記非ヒト対象の睡眠状態を分類するステップは、
前記1または複数の周波数重み付け時期をクラスタ化するステップと、
前記クラスタ化に従い、睡眠状態の指定を前記1または複数の周波数重み付け時期に割り当てるステップと、
前記1または複数の周波数重み付け時期によって表される前記期間、前記非ヒト対象の睡眠状態を示す前記睡眠状態の指定を与えるステップと、
を含む、請求項8に記載の方法。 - 前記1または複数の周波数重み付け時期をクラスタ化するステップは、K平均法でクラスタ化するステップを含む、請求項8に記載の方法。
- 要素分析により脳波検査データを前処理するステップをさらに含む、請求項8に記載の方法。
- 前記非ヒト対象の睡眠状態を分類するステップは、単独の要素分析を前記1または複数の周波数重み付け時期に適用するステップを含む、請求項8に記載の方法。
- 睡眠状態の指示を前記1または複数の周波数重み付け時期に割り当てるステップは、
少なくとも低周波数情報に基づき、非徐波睡眠の指示から徐波睡眠の指示を決定するステップと、
少なくとも高周波数情報に基づき、ノンレム睡眠の指示からレム睡眠の指示を決定するステップと
を含む、請求項8に記載の方法。 - 睡眠状態の指示を前記1または複数の周波数重み付け時期に割り当てるステップは、平滑窓を前記1または複数の重みをかける時期に適用するステップであって、平滑化は、前記1または複数の重みをかける時期に渡って睡眠状態の指示を平均化するステップを含むことができるステップをさらに含む、請求項8に記載の方法。
- 類似している睡眠状態の指示を有する前記1または複数の時期によって表される前記期間、前記非ヒト対象の前記睡眠状態を代表する標準的スペクトルとして1または複数の周波数重み付け時期を与えるステップをさらに含む、請求項8に記載の方法。
- 複数の異なる睡眠状態の前記二重正規化されたデータの特徴を表す判別関数を定義するステップと、前記判別関数を使用して前記二重正規化されたデータから睡眠状態を決定するステップとをさらに含む、請求項8に記載の方法。
- 任意の特定の時間において最も高い標準値を有する周波数として好ましい周波数を特徴付けるステップと、前記好ましい周波数を分析して前記少なくとも1つのパラメーターを決定するステップとをさらに含む、請求項8に記載の方法。
- 脳波の活動を示す少なくとも1つの信号を受信し、前記少なくとも1つの信号を周波数帯域ごとに時間で正規化し、前記正規化することとの組み合わせにより、少なくとも1つの周波数帯域における前記データの低出力を他の周波数帯域におけるデータの高出力に比較して増加させるための二重正規化されたデータを形成すべく、前記データを正規化する第2の正規化するステップを実行するコンピュータデバイスを備え、
前記コンピュータによって実行される前記第2の正規化するステップは、前記正規化されたデータを時間ごとに周波数で正規化するステップと、脳波の活動を示す前記二重正規化されたデータを使用して睡眠状態を示す少なくとも1つのパラメーターを決定するステップとを有する、装置。 - 脳波信号を示す情報を受信する第1の受信部分と、
脳波の活動を示す正規化されたデータを形成し、また脳波の活動を示す前記正規化されたデータを使用して睡眠状態を示す少なくとも1つのパラメーターを決定するよう、前記脳波信号の少なくとも1つの周波数帯域で正規化する処理部分と
を備え、
前記処理部分は、
前記データを周波数帯域ごとに時間で正規化し、脳波の活動を示す正規化されたデータを形成するステップと、
前記正規化されたデータを形成するステップとの組み合わせにより、少なくとも1つの周波数帯域における前記データの低出力を他の周波数帯域におけるデータの高出力に比較して増加させるための二重正規化されたデータを形成すべく、前記データを正規化する第2の正規化ステップと
を実行し、
前記コンピュータによって実行される前記第2の正規化ステップは、前記正規化されたデータを時間ごとに周波数で正規化するステップを有する、装置。
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CA2607049A1 (en) | 2006-11-16 |
US8073534B2 (en) | 2011-12-06 |
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