CONTROL OF STATIC PRESSURE BY EXPIRATORY MUSCLES DURING EXPIRATORY EFFORT AND PHONATION

被引：4

作者：

LEINONEN, L

LAAKSO, ML

机构：

[1] Department of Physiology, University of Helsinki, Helsinki

来源：

JOURNAL OF VOICE | 1990年 / 4卷 / 03期

关键词：

D O I：

10.1016/S0892-1997(05)80021-9

中图分类号：

R36 [病理学]; R76 [耳鼻咽喉科学];

学科分类号：

100104 ; 100213 ;

摘要：

Surface electromyography (EMG) impulse frequency was measured in six subjects at eight recording sites on the chest and abdomen during the maintenance of positive mouth pressures and the phonation of a long vowel ([a:] in the Finnish word aamu) at three intensity levels. The pattern of muscle activation was similar in these two behavioral tasks. In upright posture, at lung volumes from 20% vital capacity (VC) below to 30% above functional residual capacity (FRC), EMG frequency increased rather linearly with increasing mouth pressure within 0 and 20 cm H2O. A qualitatively similar relationship was observed between EMG frequency and phonation intensity. The results suggest that the expiratory effort task can be used as a model for the control of subglottal pressure during phonation at static subglottal pressures. © 1990 Raven Press, Ltd., New York.

引用

页码：256 / 263

页数：8

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