National Certification Board for Therapeutic Massage & Bodywork (NCBTMB) Practice Exam

The medial wall of the orbit is primarily formed by the lacrimal bones, which play a crucial role in the structure and function of the orbital cavity. The lacrimal bones are small, thin bones located in the inner corner of each eye socket. They contribute to the formation of the lacrimal sac and the nasolacrimal duct, which are involved in the drainage of tears from the eye to the nasal cavity. Their positioning makes them significant for the integrity of the medial orbital wall.

The zygomatic bone, maxilla, and frontal bone also contribute to the orbital structure but are not part of the medial wall. The zygomatic bone primarily forms the lateral wall and part of the floor of the orbit, while the maxilla contributes to the floor and anterior wall. The frontal bone contributes to the roof of the orbit. Understanding these anatomical relationships is essential for comprehending the overall structure of the orbit and the functions of its various components.