Nagai T
Department of Otolaryngology, Miyazaki Medical College, Kiyotake, Japan.
Acta Otolaryngol. 1989 Mar-Apr;107(3-4):278-82. doi: 10.3109/00016488909127509.
The overall morphology of the encapsulated nerve structure in the human vocal cord was studied. The nerve consists of a straight portion containing a striated muscle fiber and several side branches. The side branches consist of non-myelinated fibers and dense collagen bundles. Their ultrastructure resembles that of the Golgi tendon organ, suggestive of a pressure receptor. Since the side branches extend between muscle fibers of the vocal muscle, their purpose may be to detect the stiffness of the vocal cord. One end of the intracapsular muscle fiber terminates in the capsule and the other, tapered end terminates in dense collagen bundles within the capsular space. Contraction of muscle fiber alters the stiffness of the intracapsular space and may control the sensory threshold of the nerve ending.
对人类声带中被包裹神经结构的整体形态进行了研究。该神经由一个包含横纹肌纤维的直部和几个侧支组成。侧支由无髓纤维和致密胶原束组成。它们的超微结构类似于高尔基腱器官，提示为压力感受器。由于侧支在声带肌的肌纤维之间延伸，其目的可能是检测声带的硬度。囊内肌纤维的一端终止于囊内，另一端逐渐变细，终止于囊腔内的致密胶原束中。肌纤维的收缩会改变囊内空间的硬度，并可能控制神经末梢的感觉阈值。
