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目的:探讨太空微重力对鸡胚耳蜗神经元的形态发育有无影响。方法:随机选取太空发育鸡胚和地面发育鸡胚各2只,利用计算机显微测量技术测量耳蜗神经节神经元截面的面积、周长、形态系数,每只鸡胚测量200个神经元。结果:2只太空发育鸡胚的耳蜗神经元截面的面积分别为(109.62±22.56)μm2和(123.63±26.73)μm2,周长分别为(39.71±4.28)μm和(42.00±4.87)μm,形状系数分别为0.865 2±0.048 7和0.872 4±0.058 7。2只地面发育鸡胚的前庭神经元截面的面积分别为(118.22±26.82)μm2和(114.08±27.83)μm2,周长分别为(41.23±4.88)μm和(40.25±5.08)μm,形状系数分别为0.864 7±0.061 4和0.872 2±0.048 2。结论:本研究结果提示微重力对耳蜗神经元的形态发育可能无影响。
Objective: To investigate whether space microgravity affects the morphological development of chick embryo cochlear neurons. Methods: Two chick embryos and two chick embryos were randomly selected. The area, perimeter and morphological coefficient of neuron cross section of cochlear ganglion were measured by computer microscopic measurement. 200 neurons were measured in each chick embryo. RESULTS: The cross-sectional area of the cochlear neurons in the two embryos were (109.62 ± 22.56) μm2 and (123.63 ± 26.73) μm2, respectively, with the lengths of (39.71 ± 4.28) μm and (42.00 ± 4.87) μm, respectively The coefficients of the vestibular neurons were 7.265 ± 0.048 7 and 0.872 4 ± 0.058, respectively. The cross sections of the vestibular neurons in the ground-based chicken embryos were (118.22 ± 26.82) μm 2 and (114.08 ± 27.83) μm 2, respectively, with circumference of 41.23 ± 4.88) μm and (40.25 ± 5.08) μm respectively, and the shape coefficients were 0.864 7 ± 0.061 4 and 0.872 2 ± 0.048 2, respectively. Conclusion: Our results suggest that microgravity may have no effect on morphological development of cochlear neurons.