1100 



SURGICAL AND TOPOGRAPHICAL ANATOMY 



inner border, the thicker and l)ctter marked of the two, overlaps the carotids; the 

 common carotid corresi)onding, as far as tlie upper l)order of the thyroid, with a 

 Hne drawn from the sterno-clavicular joint to midway l^etween the mastoid process 

 and the angle of the jaw. The artery can be best compressed above the level of the 

 cricoid, as here it is less deeply covered. The transverse process of the sixth 

 cervical vertebra is called the carotid tubercle, after Chassaignac, who advised com- 

 pression of the carotid at this point. This process lies two to three inches above 

 the clavicle. Compression l)elow it will command the vertebral as well. The 

 student should recall the deep relations of the sterno-mastoid, which he may 



Fig. 674.— Thymus Glaxd in a Child at Bieth. 



Thyro-hyoid membrane ' 



THYROID CARTILAGE --jLA, 



Sterno-thyroid muscle 

 Crico-thyroid 

 membiane 



Crioo-thyroid muscle 



THYROID GLAND 



Right common cat olid 



arterti 

 RIGHT PSTT'MO- 

 GASTRIC ,\EBVE 

 Right internal jiigvlai 

 vfin 



Level of sternum 



SECTION OF CLAVICLE 

 SECTION OF FIRST RIB 



SECTION OF STERNUM 



, ,"^ - Thyro-hyoid muscle 



Lateral portion crico- 



/ thyroid membrane 



IM»!L_- Omo-hyoid muscle 

 *■ '-^ sterno-mastoid muscle 



CRICOID CARTILAGE 

 FIRST RING OF TRACHEA 



TRACHEA 



\ Left suspensory 



, ligament 



^ LEFT KECI-RREST 

 \ NEK VE 



(Esophagus 



Left innominate vein 

 LEFT LOBE OF THYMUS 



Left internal manuiiary 

 artery 



Pericardium 



SECTION OF FIFTH COSTAL 

 CARTILAGE 



ENSIFORM CARTILAGE 



classify as vessels, nerves, muscles, glands, and bones; or, according to their posi- 

 tion, (1) those above the level of the angle of the jaw; (2) those between the 

 angle of the jaw and the omo-hyoid; (3) those below the omo-hyoid. 



Of the two lieads of the sterno-mastoid, the sternal is the thicker and more 

 prominent, the clavicular the Avider. A stal) through the space (or interval) which 

 lies between the two heads would wound the l)ifurcation of the innominate on 

 the right side, and the common carotid on the left. 



The position of the anterior jugular, curving outwards to pass beneath l)oth 

 origins of the muscle a little al)ove tlie clavicle, and the external jugular, crossing 



