Yoshida Y, Yatake K, Tanaka Y, Imamura R, Fukunaga H, Nakashima T, Hirano M
Department of Otorhinolaryngology and Head and Neck Surgery, Kurume University School of Medicine, Japan.
Acta Otolaryngol Suppl. 1998;539:98-105. doi: 10.1080/00016489850182242.
Gross anatomical and histological studies and immunohistochemical demonstration of cholera toxin B subunit used as a retrograde tracer were performed to investigate distinct muscle fibre bundles (MFBs) in the feline intrinsic laryngeal muscles (ILMs) and to characterize the respective supplying motoneurons in the nucleus ambiguus (AM). Distinct bundles were observed in all ILMs except the lateral cricoarytenoid muscle. Motoneurons supplying MFBs related to phonation located more medially than others. Motoneuron size did not differ between distinct MFBs in the same muscle. Neurodendrites for the cricothyroid muscle (CT) and adductor motoneurons extended dorsomedially, ventrolaterally and ventromedially, while those for the posterior cricoarytenoid muscle (PCA) motoneurons stretched dorsomedially and ventrolaterally. We conclude that distinct MFBs in ILMs play different roles in laryngeal functions, and that corresponding motoneurons have their own specific visceroneural nature allowing regulation of complex laryngeal functions. To receive information from the central nervous system, laryngeal motoneuron dendrites extended to regions locating respiratory, phonatory and swallowing neurons.
进行大体解剖学、组织学研究以及将霍乱毒素B亚基用作逆行示踪剂的免疫组织化学证明，以研究猫喉内肌（ILMs）中不同的肌纤维束（MFBs），并对疑核（AM）中各自的供应运动神经元进行表征。除环杓侧肌外，在所有ILMs中均观察到不同的束。供应与发声相关的MFBs的运动神经元比其他运动神经元位于更内侧。同一肌肉中不同MFBs之间的运动神经元大小没有差异。环甲肌（CT）和内收运动神经元的神经树突向背内侧、腹外侧和腹内侧延伸，而后环杓肌（PCA）运动神经元的神经树突向背内侧和腹外侧延伸。我们得出结论，ILMs中不同的MFBs在喉部功能中发挥不同作用，并且相应的运动神经元具有其自身特定的内脏神经性质，从而能够调节复杂的喉部功能。为了从中枢神经系统接收信息，喉运动神经元树突延伸到定位呼吸、发声和吞咽神经元的区域。
