It has to do with the nerve running right below the Pectoralis minor. The median nerve gets irritated by the muscle. This is how I understood it anyway. As for my pain, I get excruciating pain down my arm to my hand which will getnumb and tingly, and pain under my arm as well.
Originally Posted by james079
This is interesting, there is no muscle testing position which will enable you to distinguish it from pec major very easily. Pectoralis minor draws the shoulder blade forwards and downwards. If the shoulder blade is held more rigid by other muscles it will elevate the ribs. Can you remember what you did, if anything to get this condition. Also where is your pain.
Pec minor is different from thoracic outlet as it is external to the ribs.
this is interesting