The nerves of the infrahyoid neuro-muscular pedicle are mainly derived from the superior root of the ansa cervicalis.

舌下肌群神经肌蒂的神经主要来自颈袢上根。

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.

得出胸上隙应是由颈深筋膜浅层和舌下肌筋膜围成，而不同于科书中描述的由颈深筋膜浅层分为两层附着于胸形成。