It is found the suprasternal space should be enclosed by the superficial layer of the deep cervical fasciae and the fasc得出胸骨上间隙应是由颈深筋膜浅层和舌骨下肌筋膜围成，而不同于以往教科书中描述的由颈深筋膜浅层分为两层附着于胸骨形成。