Section of the Skull Showing the Muscles of the Eye

Description

Anterior orbital dissection reveals the globe seated within the bony orbit, with the cornea and sclera visible and fine episcleral vessels tracing the anterior surface. The four rectus muscles, superior, inferior, medial, and lateral rectus, converge toward the anterior sclera, their tendons meeting the ocular fascia (Tenon capsule) in a symmetric ring around the limbus. Superomedially, the superior oblique courses toward the trochlear region before redirecting posterior-to-anterior to insert on the superolateral sclera, while the optic nerve is implied deep and posterior at the orbital apex near the optic canal. Muscle bellies sit peripheral to the globe; insertions sit anterior. Orientation is explicit. Extraocular muscle anatomy is where ocular motility exams become anatomical, because each muscle’s insertion and line of pull predicts the pattern of diplopia in cranial nerve palsies. Superior oblique dysfunction (trochlear nerve, CN IV) classically produces vertical diplopia that worsens in downgaze, and the long oblique path to the trochlea explains why subtle head tilt compensation is common. Rectus tendon crowding at the anterior sclera also frames the surgical logic of strabismus procedures, where recession or resection shifts the effective force vector without violating the globe. Small distances matter. Use this artwork in head and neck anatomy teaching to map rectus and oblique actions to clinical gaze testing, and in ophthalmology or neuro-ophthalmology texts illustrating CN III, IV, and VI palsy patterns and standard strabismus approaches through the conjunctiva and Tenon capsule. It also suits exam-prep diagrams that require clean tendon-to-sclera relationships for version and duction interpretation. Anatomical accuracy verified by SciePro's Medical Advisory Board.