THORAX. 135 



MYOLOGY. 



Spinal Region. — Seven pairs. 



1. Trapezium. — Synonyms : Dorso and cervico-acro- 

 mialis, (G). Attachments : The funicular cord of the 

 cervical ligament, the apex of the superior spinous pro- 

 cess of the first dorsal vertebrae, the tuberosity of the 

 acromion and external surface of the scapular aponeu- 

 rosis. Action : Raises the shoulder and carries it for- 

 wards or backwards. 



2. Greatdorsal — Synonyms: Dorso-humeralis, (G). 

 Latissimus dorsi, (P). Attachments : The apex of the 

 spinous process of all the lumbar and fourteen or fif- 

 teen last dorsal vertebrae, internal tuberosity of the hu- 

 merus. Action : Carries the arm backwards and up- 

 wards. 



3. Small anterior serrated. — Synonyms : Dorso- 

 costalis, (G). Superficialis costarum, (P). Anterior 

 serrated, (L). Attachments: The summit of the spi- i 

 nous process of the tliirteen dorsal vertebrae follow- ! 

 ing the first, the external face of the anterior border of i 

 tlie nine ribs following the fourth. Action : Inspir- \ 

 atory. ' 



4. Small posterior serrated. — Synonyms. Lumbo- 

 costalis, (G). Superficialis costarum, (P.) Posterior • 

 serrated, (L). Attachments : The spinous processes of \ 



