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首页> 外文期刊>Neuroscience Letters: An International Multidisciplinary Journal Devoted to the Rapid Publication of Basic Research in the Brain Sciences >Sympathetic vasoconstrictor neurons projecting from the guinea-pig superior cervical ganglion to cutaneous or skeletal muscle vascular beds can be distinguished by soma size.
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Sympathetic vasoconstrictor neurons projecting from the guinea-pig superior cervical ganglion to cutaneous or skeletal muscle vascular beds can be distinguished by soma size.

机译：从豚鼠上颈神经节突出到皮肤或骨骼肌血管床的交感性血管收缩神经元可以通过躯体大小来区分。

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摘要

We have used a combination of retrograde axonal tracing and intracellular dye injections to determine the soma size of sympathetic vasoconstrictor neurons projecting from the superior cervical ganglion to the cutaneous vascular bed of the eartips, or to the vascular beds of the masseter muscle, of guinea-pigs. Neurons projecting to vasculature of the masseter muscle had a cross-sectional area of 956 +/- 295 microns2 (mean +/- SD; n = 45 cells) and were significantly larger than neurons projecting to the vasculature of the eartip skin (mean cross-sectional area +/- SD, 604 +/- 251 microns2; n = 39 cells). These results are consistent with physiological observations showing that muscle vasoconstrictor neurons have faster conduction velocities than cutaneous vasoconstrictor neurons. Furthermore, they suggest that muscle vasoconstrictor neurons may innervate a larger volume of vasculature compared with cutaneous vasoconstrictor neurons.
机译：我们已经结合使用逆行轴突示踪法和细胞内染料注射法来确定交感性血管收缩神经元的体细胞大小，该神经元从上颈神经节投射到耳垂的皮肤血管床或几内亚的咬肌的血管床猪。投射到咬肌肌肉血管的神经元的横截面积为956 +/- 295微米2（平均+/- SD; n = 45个细胞），并且比投射到耳尖皮肤血管的神经元（平均截面积+/- SD，604 +/- 251微米2; n = 39个单元）。这些结果与生理观察结果一致，生理观察结果表明，肌肉血管收缩神经元比皮肤血管收缩神经元具有更快的传导速度。此外，他们认为，与皮肤血管收缩神经元相比，肌肉血管收缩神经元可以支配更大的血管系统。

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