Which extraocular muscle does NOT originate at the annulus of Zinn?

The extraocular muscle that does not originate at the annulus of Zinn is the inferior oblique muscle. Unlike the other extraocular muscles, which arise from the common tendinous ring, the inferior oblique originates from the maxillary bone just above the nasolacrimal duct. This unique origin allows it to have a different action, primarily assisting in elevating and extorting the eye.