Overview

SIDE STRAIN ANATOMY The abdominal wall is composed primarily of three muscles from exterior to interior they are: • the external oblique

• the internal oblique and • the transversus abdominis They all comprise a muscular origin and a more tendinous or, more specifically, aponeurotic insertion Anteriorly they attach to the rectus abdominis muscle

Posteriorly they attach to the quadratus lumborum muscle and Inferiorly via aponeurosis to the inguinal ligament and pubis Depending on the particular muscle, there are also attachments to the undersurface of the ribs below rib 9 and to the iliac blade SIDE STRAIN INJURY

Side strain injury is a tear predominantly involving the internal oblique muscle most commonly from the undersurface of rib 10 or 11 (red area on image) A similar but different type of injury can be a tear from the iliac crest Tears of the aponeurotic insertion are biomechanically different, see under the heading Athletic Pubalgia