WORK PRELIMINARY TO DISSECTION 45 



the muscle, so that an underlying muscle will not be injured; 

 then, after the muscle is fairly well freed to near its origin and 

 insertion, pass the grooved director under it and hold the 

 instrument in such a way that it passes under the middle of the 

 belly of the muscle and at right angles to the fibers (Fig. i8); 

 then, running the scissors blade along the groove of the director, 

 transect the muscle neatly. There are a few exceptions to this 

 rule for transecting muscles and also to the rule that each 

 muscle should be transected before it is completely dissected 

 to its origin and insertion. Muscles properly transected can be 

 reconstructed for study by simply approximating the two ends 

 at the transection. 



