I too woke up one night to a limb that was asleep more than usual as it took longer that normal to regain circulation, dont know if it was due to the amount of time asleep or what I just knew something was different, I sleep on my right side mostly with my arm extended and pillow between my head and shoulder, the next night i had severe twitching or spasms in my right upper back for almost an hour an then it stopped, I didnt recognize anything being wrong until a week or so later I tried to catch myself on the floor pushup style and my right arm didnt support and my face crashed to the floor, I'm 5 10 210 and usually bench press 275 8-10 times on my last bench set...at that time I started investigating and noticed severe pectoral sagging or atrophy and atrophy of my long head on the tricep this was after the hurricane in september and I didnt see a dr. until december, since then I have had x-rays of c spine and Wikipedia reference-linkMRIs of the shoulder and c-spine two EMG's. the first one the nuero said I definately had a pinched nerve somewhere, prob from the bulge in 4-5 protrusion 6-7 and bulge in 7-t1 or 8 that was seen in the MRI.... My neurosurgeon seems to believe its a brachial plexus injury of some sort, a strech or tear, he says that my disc injuries are minimal (3mm) since there is no pain and that there is no impingement on the nerves from the discs...he didnt like the results from the first EMG and sent me to another nuero for a more in depth test, she said the same thing that there was some sort of nerve damage but that they had started to heal and said it would just take time, I have been loading up on b vitamins as recommended....... I cannot get a definative answer form anyone and that is aggravating, he(my neurosurgeon) also suggested in returning to the weightroom ASAP to slowly rehab the muscles, Since I cannot barbell press from the imbalance of strength I have started back with flyes(lightweight 25-30-35 lbs) and machine press and also isolated pressdowns and extentions for my tricep...I notice that when I flex the muscles that they cramp up easily and after they uncramp they twitch/spaz for a short while(30 seconds) ......working out is my hobby and this has been quite a depressing time for me and finding answers have not been easy, from the searching I've done on the internet this seems to be more common than I thought, but all my dr.s seem to be at a loss...I dont understand