Innervation of the Extraocular Muscles
The lateral rectus muscle is innervated by CN VI (the abducens nerve). The superior oblique muscle is innervated by CN IV (the trochlear nerve). CN III (the oculomotor nerve) has superior and inferior divisions: the upper division innervates the levator palpebrae superioris and superior rectus muscles, and the lower division innervates the medial rectus, inferior rectus, and inferior oblique muscles (see Table 1-1).
Excerpted from BCSC 2020-2021 series: Section 2 - Fundamentals and Principles of Ophthalmology. For more information and to purchase the entire series, please visit https://www.aao.org/bcsc.