结果表明，在颈部脏器的前方存在气管前间隙和舌骨下肌后间隙，在后方存在咽后间隙和危险间隙。

The results showed that the pretracheal space and the posterior infrahyoid space located in front of the viscera of the neck and the retropharyngeal space and the danger space behind it respectively.

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吻合口紧张时，可切除喉前带状肌，部分甲状舌骨膜及咽缩肌。

When tallies tight-lipped, before may excise the throat, the belt-shaped muscle, the partial armor shape tongue periosteum and swallows the constrictor.

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