Position of bord injury of brachial plexus on MRI Locati on Damage No damage Total Amou nt percenta ge Amou nt percenta ge Amou nt percenta ge Outside 26 43, 3 34 56, 7 60 100 Inside 21 35, 0 39 65, 0 60 100 Behind 25 41, 7 35 58, 3 60 100 Total 72 40, 0 108 60, 0 180 100 3.2.11.