Group XIX.Support and compression of abdominal wall and lower thorax; flexion and lateral motions of spine; synergists in strong downward movements of arm (1).(1) Rectus abdominis; (2) external oblique; (3) internal oblique; (4) transversalis; (5) quadratus lumborum Function: Muscles of the abdominal wall

VA disability rating criteria for Group XIX.Support and compression of abdominal wall and lower thorax; flexion and lateral motions of spine; synergists in strong downward movements of arm (1).(1) Rectus abdominis; (2) external oblique; (3) internal oblique; (4) transversalis; (5) quadratus lumborum Function: Muscles of the abdominal wall under Diagnostic Code 5319. The VA assigns ratings of 0%, 10%, 30%, 50% based on the severity and functional impact of your condition.