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Subzygomatic triangle. (A) The subzygomatic triangle is formed by the zygomatic arch superiorly, the temporomandibular joint posteriorly, and the frontal branch of the facial nerve anteriorly. (B) The masseter nerve (white arrow) begins at the angle between the temporomandibular joint and zygomatic arch and crosses the midpoint of the triangle base. (C) Schematic diagram of the subzygomatic triangle.
