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.

得出胸上间隙应是由颈深筋浅层下筋，而不同于以往教科书中描述的由颈深筋浅层分为两层附着于胸形。