Mechanisms of Larynx Tube Constriction
Mechanisms of Larynx Tube Constriction
复制标题
喉管收缩的机制
DOI:
10.1159/000259890
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发表时间:
1977
期刊:
影响因子:
0.9
通讯作者:
J. Gauffin
中科院分区:
文献类型:
--
作者:
J. Gauffin
In an attempt to reach a better understanding of the laryngeal mechanisms in speech I would like to discuss how the evolution of language may have made use of more primitive laryngeal mechanisms. This seems to be relevant when we discuss the larynx which in its control is somewhat different from other speech organs, like, for instance, the tongue and the lips. Contrary to the larynx, these speech organs had already, prior to their speech function, fine, space-oriented motor control with a well-developed proprioceptive feedback, which is necessary for chewing and swallowing. The demand on the larynx, on the other hand, was more simple and its main functions were originally to protect the trachea and the lungs from foreign objects and to assist in breathing by regulating the outflow of air, thus releasing the strain on the breathing muscles.Early in the phylogenesis, the mechanism for producing a larynx tone evolved by the development of independent control mechanisms of the intrinsic muscles of the larynx. These primitive or basic laryngeal mechanisms are associated with three different postures of the larynx: for breathing, protection, and phonation. Movements from one posture to another are the most natural types of laryngeal articulation in the sense that they do not have to be learned and are functioning already in the newborn child.