44 PRACTICAL ANATOMY. 



1 1. The hyoid bone in the mid mento-sternal line. 



12. The body of the hyoid bone, one-half of an inch long to touch. 



13. The greater horn of the hyoid + lingual artery above same. 



14. The thyroid cartilage Adam's apple and notch above. 



15. The thyro-hyoid space + thyro-hyoid membrane. 



1 6. The thyroid notch + mid-part of thyro-hyoid membrane. 



17. The crico-thyroid membrane in crico-thyroid space. 



18. The cricoid cartilage and trachea. (Fig. 27.) 



INCISIONS. 



1 . Through the mid mento-sternal line. 



2. From symphysis menti to mastoid process. 



3. From sternum to acromion process. 



BOUNDARIES OF THE NECK. 



1 . Anterior, The mid mento-sternal line. 



2. Posterior. The anterior border of the trapezius. 



3. Inferior. The clavicle and manubrium sterni. 



4. Superior. Lower border of mandible and masto-mandibular line. 



TRIANGLES OF THE NECK. (Fig. 21.) 



1 . Submaxillary or digastric. 



2. Superior carotid or triangle of election. 



3. Inferior carotid, tracheal, or triangle of necessity. 



4. Occipital not suboccipital. 



5. Subclavian or brachial triangle. 



BOUNDARY STRUCTURES OF CERVICAL TRIANGLES. (Fig. 23.) 



1 . The sterno-cleido-mastoid muscle. 



2. The mid mento-sternal line. 



3. The lower border of the mandible. 



4. The masto-mandibular line. 



5. The oino- ky aid muscle. 



6. The digastric muscle. 



7. The stylo-hyoid muscle. 



8. The manubrium sterni and clavicle. 



SURGICAL AND MEDICAL AREAS OF THE NECK. 



Larynx intubation and laryngotomy. 



Tracliea tracheotomy, high and low. 



Tliyroid gland operations on. 



The contents of the carotid sheath. 



The subclavian artery and its branches. 



The bracliial and cervical plexuses. 



The apex of the lung, one and one-half inches above the first rib. 



Traclieal and bronchial respiration. 



The siiperficial lympliatic glands. (Fig. 23.) 



The upper set of deep lymphatic glands. 



The loiver set of deep lympliatic glands. 



