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1 Trigger Point generated tension in the lateral pterygoid tends to pull the lower jaw and partially dislocate the joint. 2  This is where the popping or clicking sound in the jaw comes from. 3  Trigger points in this muscle refer pain to the cheek, mimicking sinus pain. 4  Besides that, they can stimulate sinus secretions.
Annulus of Zinn Go to Academy Store Learn more and Purchase. The annulus of Zinn is the fibrous ring formed by the common origin of the 4 rectus muscles (Fig 1-5). The ring encircles the optic foramen and the central portion of the superior orbital fissure. The superior origin of the lateral rectus muscle separates the superior orbital fissure into 2 compartments.