THE AfirsCULAR SYSTE.U 17 



fore, be classified aeconlin^; (o their act ions as in I lie folUtwiii^ 

 categories: 



Flexors, lieiul a part. 



Extensors, straighten a i)art. 



Adductors, move one part toward aiiotlier or toward tlic iiiosal j)lane of tlie 

 liody. 



Abductors, move one part away from another or away from the rnesal 

 phuie. 



Rotators, rotate a part upon its axis. 



Depressors, lower or depress a part. 



Levators, elevate or lift a part. 



The action of individual muscles or muscle masses can be 

 demonstrated by stimulation with a galvanic current upon a 

 fresh specimen. The experiments will be performed by the 

 instructor, the class making the observations and formulating 

 explanations and answers to questions. 



By either experiment or judgment of the action of muscles 

 formed through observing the direction of fibers and attachments 

 select indivitlual muscles exemplifying each category mentioned 

 above and label accordingly the proper muscles on the plate. 



If time permits, other muscles may be studied under the direc- 

 tion of the instructor. 



