对侧孤束核及迷走神经背核内的末梢较同侧为少。
They are less in the contralateral solitary tract nucleus and the dorsal nucleus of the vagus nerve.
大量纤维形成孤束，主要分布于两侧孤束核、迷走神经背核及最后区。
Most of the fibers form the solitary tract and distribute bilaterally to the nuclei of solitary tract, the dorsal nuclei of the vagus nerve and the area postrema.
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