Gibbels E, Kentenich M, Behse F
Klinik und Poliklinik für Neurologie und Psychiatrie, Universität zu Köln, Germany.
Acta Neuropathol. 1994;88(2):174-9. doi: 10.1007/BF00294511.
Since normal structural details of human greater auricular nerve (GAN) have not as yet been studied with modern techniques, light and electron microscopic findings of seven presumably normal GANs, obtained from five patients during radical neck dissection, were compared with those of normal sural nerves (SNs). In GANs there was a tendency to higher densities per mm2 and a larger number of small-diameter fibers in myelinated fibers (MFs) and unmyelinated fibers (UFs) without obvious signs of de- or regeneration. UF histograms were unimodal in both groups, with mean UF diameters being somewhat smaller in GANS than in SNs. Schwann cell complexes containing several or even numerous UFs were more frequent in GANs than in SNs. In GANs, UF often occurred focally in great numbers within large Schwann cell complexes (polyaxonal complexes), not commonly seen in normal SNs. It is concluded that these structural peculiarities in GANs reflect natural conditions in short sensory nerves irrespective of any specific function.
由于尚未运用现代技术对人类耳大神经（GAN）的正常结构细节进行研究，因此将在根治性颈清扫术中从5例患者获取的7条推测为正常的GAN的光镜和电镜检查结果，与正常腓肠神经（SN）的结果进行了比较。在GAN中，每平方毫米的密度有升高趋势，有髓纤维（MF）和无髓纤维（UF）中小直径纤维的数量较多，且无明显的退变或再生迹象。两组的UF直方图均为单峰，GAN中UF的平均直径略小于SN。含有数个甚至众多UF的施万细胞复合体在GAN中比在SN中更常见。在GAN中，UF常大量集中出现在大型施万细胞复合体（多轴突复合体）中，这在正常SN中并不常见。得出的结论是，GAN中的这些结构特性反映了短感觉神经的自然状态，与任何特定功能无关。
