Annulus of Zinn Recti Origin — FRCA Primary MCQ

Instant feedback + full explanation. One question, done properly.

HardAnatomyAnnulus of Zinn Recti OriginFRCA Primary

Regarding the anatomy of the orbit the annulus of Zinn (common tendinous ring) gives origin to which structures?

Educational content. Not a substitute for clinical judgement or local policy.

Reveal the answer and explanation

Correct answer: A — The four recti muscles of the eye and transmits the optic nerve and ophthalmic artery

The annulus of Zinn is a fibrous ring at the apex of the orbit that gives origin to the four recti muscles (superior / inferior / medial / lateral). Structures passing through it include: optic nerve (CN II) / ophthalmic artery / superior and inferior divisions of CN III / CN VI (abducens) / and nasociliary nerve (V1). CN IV (trochlear) and the frontal and lacrimal nerves pass outside the ring.

Reference: RCoA 2021 Primary FRCA Curriculum