舌圧発現時の圧力時間曲線パターンの解析と発声発語機能との関連

Association of tongue pressure with force-time parameters and motor speech function tasks in healthy subjects

　舌圧発現時の目標値までの到達時間測定を試み，得られたデータと発声発語機能との関連性およびその性差を検証することを目的とした．被験者は，若年健常成人25名とした．舌圧測定器(JMS社製，TPM-01)を用いて測定した最大舌圧から，目標舌圧を算出し，その目標舌圧までの到達時間を解析した．発声発語機能の評価には，単音節の交互反復運動速度，発話速度および構音速度を採用した．結果，最大舌圧の30％舌圧までの到達時間と発声発語機能で有意な相関関係を示した．また，男性は女性に比べ最大舌圧の30％・90％舌圧までの発現時間が有意に短かった．30％舌圧発現時間は構音機能の基本的能力を反映していると推測され，dysarthriaの評価と治療の今後の研究の方向性を示唆する．

　The purpose of this study was to measure the time taken to reach the target value when tongue pressure was developed, to clarify the relationship with the utterance motor speech function, and to determine tongue pressure differences between males and females. The subjects were 25 young healthy adults (age 22.5±2.1 years). The maximum tongue pressure was measured using a tongue pressure measuring device (JMS, TPM-01), and the time taken to achieve the target tongue pressure was calculated based on the tongue pressure expression time. To evaluate the speech utterance function, we adopted the alternating motion rate of monosyllable, the speaking rate, and the articulation rate. A significant correlation was found between the time taken to reach 30% tongue pressure (T30%) and the speech utterance function. Male subjects took shorter time to reach 30% and 90% of maximum tongue pressure than female subjects. T30% seems to reflect the basic ability of the articulatory motor function, suggesting a future direction for studies of the treatment and evaluation of dysarthria.