Universal Words/Terms

• Origin and Insertion (xlas)

Origin and Insertion (xlas)

You may confuse these two, so here is a general guideline:

• The origin part usually does not move (or move less than the insertion part) when the muscle is flexed. 
  
• The insertion part usually moves when the muscle is flexed.

Also note that origin and insertion areas always refer to tendons that connect a muscle and a bone. There are no muscles that connect directly to a bone.