It is found the suprasternal space should be enclosed by the superficial layer of the deep cervical fasciae and the fasciae of the infrahyoid muscles, rather than the past opinion of the textbook.

得出胸骨上间隙应是由颈深层和舌骨下围成，而以往教科书中描述的由颈深层分为两层附着胸骨形成。