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明确喉部制动和对中机制的功能。

Specifying the function of arresting and centering mechanisms of the larynx.

作者信息

Pesák J

出版信息

Acta Univ Palacki Olomuc Fac Med. 1989;121:163-70.

PMID:2533799
Abstract

A specific function of larynx represents the creation of voice-phonation, whose mechanisms are not as of yet sufficiently known. Thus, quite a lot of physiological phenomena cannot be properly recognized. Some anatomical details are not described at all and in the figure part of literature are left out in spite of their evident existence. These critical remarks pertains wholly to the up to date's knowledge of the role of the pseudo voice ligaments. The very existence of the pseudo voice ligament rather puzzles. The pseudo vocal fold are supposed to be immobile. There's a good reason to suppose that the pseudo voice ligaments follow a very important movent, though unnoticeable, in the direction of the elastic fibres, right at the phonal position. The fibres of the pseudo voice ligaments are drawn dorsally at which they draw upsligh the thyroid cartilage. It looks like the elastic fibres of the pseudo voice ligaments were functioning as a centering mechanism known with the electro-acoustical systems. As if this arrangement was to bring the thyroid cartilage in its role of a membrane into such position in which it could vibrate in both its directions, dorsal and ventral. The pseudo glotic ligaments represent at the same time a part of an arresting arrangement which damps in its respiration position the flexible prestress of the thyroid cartilage. If it were not so, the thyroid cartilage would vibrate automatically even in respiration producing at the same time unwanted sounds.

摘要

喉的一项特殊功能是发声,但其机制尚未完全明确。因此,许多生理现象无法得到恰当的认识。一些解剖细节根本未被描述,尽管明显存在,但在文献的图示部分也被遗漏。这些批判性言论完全适用于目前对假声带作用的认识。假声带的存在本身就相当令人困惑。假声带被认为是不动的。有充分理由推测,假声带在发声位置沿着弹性纤维方向进行着一种非常重要但不易察觉的运动。假声带的纤维向背侧牵拉,同时牵拉甲状软骨向上。看起来假声带的弹性纤维起到了一种在电声系统中已知的定心机制的作用。仿佛这种排列是为了使甲状软骨作为一个膜处于能够在背侧和腹侧两个方向振动的位置。假声韧带同时也是一种制动装置的一部分,在呼吸位置时它会减弱甲状软骨的弹性预应力。如果不是这样,甲状软骨甚至在呼吸时也会自动振动,同时产生不必要的声音。

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