Nagai T
Department of Otolaryngology, Miyazaki Medical College, Kiyotake, Japan.
Acta Otolaryngol. 1987 Sep-Oct;104(3-4):363-9. doi: 10.3109/00016488709107341.
Encapsulated nerve structures which contain abundant axon terminals between dense collagen fibres are found in the intermuscular connective tissue of m. vocalis and the subepithelium of the cartilaginous part of the human vocal cord. Axon terminals are either partly surrounded by or lack the Schwann sheath. They directly face to the basal lamina and collagen fibres and together represent the receptors of mechanical stimuli. The location of these nerve structures in the vocal cord may indicate that they serve to detect its degree of rigidity. Encapsulated nerve structures in m. vocalis contain a striated muscle fibre. The termination of this fibre within the capsule resembles that of the Golgi tendon organ. Since the encapsulated nerve structures are located near the termination of muscle fibres in the vocal ligament, they may serve to detect the tension of muscle fibres which pull on the vocal cord during vibration of the vocal mucosa. Encapsulated nerve structures in the cartilaginous part of vocal cord are located in the submucosa where they are covered by thick stratified squamous epithelium with papilla. These regions often contact each other in the state of full adduction of the arytenoid cartilages. Therefore the encapsulated nerve structures may detect the bilateral contact of the vocal cord when the glottis is closed.
在人声带肌的肌间结缔组织和声带软骨部的上皮下组织中发现了被包裹的神经结构，这些结构在致密的胶原纤维之间含有丰富的轴突终末。轴突终末要么部分被施万鞘包围，要么没有施万鞘。它们直接面对基膜和胶原纤维，共同构成机械刺激的感受器。这些神经结构在声带中的位置可能表明它们用于检测声带的僵硬程度。声带肌中的被包裹神经结构包含一条横纹肌纤维。该纤维在被膜内的终止方式类似于高尔基腱器官。由于被包裹的神经结构位于声带韧带中肌纤维的终止部位附近，它们可能用于检测在声带黏膜振动期间牵拉声带的肌纤维的张力。声带软骨部的被包裹神经结构位于黏膜下层，在那里它们被有乳头的厚复层鳞状上皮覆盖。在杓状软骨完全内收的状态下，这些区域常常相互接触。因此，当声门关闭时，被包裹的神经结构可能检测到声带的双侧接触。
