NECK. 



Fig. 328. 



569 



Shews from below the cervico-thoracic septum constituting the roof of the thorax, and giving 

 passage to the great vessels. It represents a transverse and horizontal section through the 

 second intervertebral disc, and parts at the same level. 



A, second dorsal vertebra. 



B, tranverse division of the manubrium sterni. 



C, first ribs. 



D, vertebral extremity of second ribs. 



a, a, fascia, extending between the great vessels 

 and first two ribs. 



b, b, its insertion at the first ribs. 



c, c, its insertion at the second vertebrae. 



d, d, lamina between the great vessels, attached 

 centrally to them, in front to the sternum, where 

 it forms a cul-de-sac, and behind to the second 

 dorsal vertebra. 



cordance with the general law of its arrange- 

 ment for the separation of muscles ; is desti- 

 tute of any particular surgical interest, and 

 forms no exception to the general observations 

 given in a preceding article. (See BACK.) 



A portion (but a very distinct portion) of this 

 great aponeurosis is the pre-vertebral fascia. 

 It extends from the occiput to which it is 



the aponeurosis, extending within the sternum. 



y, the trachea. 



g, the oesophagus. 



h, the arteria innominata. 



, the right vena innominata. 



k, the left vena innominata ; tranverse band uni- 

 ting the two sides of the aponeurosis. 



/, the left carotid artery. 



m, the left subclavian artery. 



n, section of the muse. long, colli. 



fixed in front of the recti capitis antici to the 

 inlet of the chest, where it adheres, beside the 

 longus colli, to the neck of the first rib; it 

 binds down the pre-vertebral muscles, is at- 

 tached deeply to the tips of the transverse pro- 

 cesses, and receives by its surface a septal slip 

 from the cervical fascia just externally to the 

 sheath of the vessels. An important process is 



