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APPLIED ANATOMY. 



THE CHEST CONTENTS. 



For the sake of convenience in description and record, the chest has been 

 divided into various regions and marked by certain longitudinal lines. 



THE LONGITUDINAL LINES. 



Seven longitudinal lines are used. They run parallel with the long axis of the body. 



1. The median line means the midline of the body. This runs down tne 

 middle of the sternum anteriorly and the middle of the back posteriorly. 



2. The parasternal line runs parallel to the edge of the sternum and midway 

 between it and the midclavicular line. 



3. The midclavicular line, also called the mammary line, is a longitudinal 



FIG. 211. The longitudinal lines of the chest used in physical diagnosis. 



line passing through the middle of the clavicle. This usually passes i to 2 cm. 

 internal to the nipple. 



4. The anterior axillary line passes through the anterior fold of the axilla. 



5. The midaxillary line passes through the middle of the axilla. 



6. The posterior axillary line passes through the posterior fold of the axilla. 



7. The scapular line passes longitudinally through the lower angle of the scapula. 



THE REGIONS OF THE CHEST. 



In the middle of the surface of the chest anteriorly there are three regions: 

 i. The suprasternal region is the part above the sternum between the sterno- 

 mastoid muscles. It is the suprasternal notch. 



