Normal Anatomy and Anomalies of the Rectus Extraocular Muscles in Human: A Review of the Recent Data and Findings

Figure 3

Specimen, in which the nerve to the inferior oblique muscle (nio) pierces the inferior rectus muscle (ir). Lateral view to the left eyeball. Lateral rectus muscle was removed, only the insertion of the lateral rectus (lr) is visible. When the nerve to the inferior oblique pierces the inferior rectus muscle, its susceptibility to injury associated with stretching of the muscle during surgical procedures seems to be greater. sr: superior rectus muscle; io: inferior oblique muscle.