Discogram

[str8shooter5]

hello, first i want to say im new here and its good to find a place like this to find info about things im going through. I just had a discogram 2 days ago and still waiting for a Dr to tell me the results although i do have a picture to bring to the surgen. on the picture it shows 2 discs and the Dr wrote next to 2 of the -ul and on the one that hurt real bad he wrote +ul can some one tell me what that means ?? thanks