Quote Originally Posted by aeclar1 View Post
Im in the same boat guys! Ive been lifting weights for 9 yrs and now this. So depressing watching my pec and left tricep dwindle into something child size. My dr found a buldging disc in my c7 area and that is causing the pinched nerve in my left shoulder blade area then radiates down my left arm. Just like most on here, the dr's can't explain my left pec going flat as it has "nothing" to do with my c7 disc. I don't believe that for a second.
Quote Originally Posted by engl22 View Post
Hi All,

I have had muscle wastage of my left pectoral trapezius and weakness of trapezius and left shoulder for 10 years. Immediately upon noticing the change in physical appearance in 1999, I consulted a neurologist who diognosed a likely C5-C7 root or plexus lesion. Although, the MRI and EMG results were normal.
I both cases the longer you leave it the less likely the nerver will return to full normal function. The best way to test the nerve hypothesis is to so EMG studies which are easier enough to organise through your neurologist. I would want to be certain what is actually causing the impingement and where exactly. Wikipedia reference-linkMRI gives a lot of false positives.

Pain is NOT a feature of nerve root pressure. Weakness and altered (often reduced) sensation is so pain need not be an indicator of the issue being in the cervical spine.

For the record this is the innervation of the PEC major. This is an implication for the neck! Innervation: lateral and medial pectoral nerves; clavicular head (C5 and C6), sternoclavicular head (C7, C8, and T1).

So with weak triceps: Innervation: radial nerve (C6, C7, and C8) you have comm issues with C6 and C7 there. Also a weak triceps will mean you will get some inhibition to contraction of the pec due to the brains perception of possible injury. Hence a secondary route to muscle wasting in that area.