126 



CLINICAL DIAGNOSTICS. 



posterior angle of the scapula to the external angle of the ilium. 

 Anteriorly the boundary :s formed by the scapula and the 

 massive shoulder muscles. 



Bv drawing the leg forward the field of percussion can be 

 somewhat enlarged. V 'aurally the density of the sternum and 

 muscles overlying it render in this region the lungs unavail- 

 able to percussion. 



Fig. 33. 

 - Dorsal and Ventral boundaries of field of pulmonary percussion. — - — Costal 

 attachment of diaphragm. — - - — Curvature of diaphragm in median plane. 

 - - - - Anterior boundaries of stomach divisions. H. Heart. P. Paunch. 



The field oj percussion is a right-angled tri- 

 angle the right angle of which lies at the 

 base of the scapula. In all animals the dorsal and 

 anterior boundaries of the field of percussion are the same, the 

 only variation being in the abdominal boundary. 



