This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head and neck, Subject name: Anatomy
[{'content': 'What overlies the lateral wall of the mastoid antrum? \nSelect and explain. \nA. Tegmen tympani, B. Mastoid process, C. Tympanic plate, D. Suprameatal triangle', 'role': 'user'}, {'content': 'Answer: D \nExplanation: BOUNDARIES: SUPERIORLY-Tegmen tympani and beyond it the temporal lobe of the cerebrum INFERIORLY-Mastoid process containing the mastoid air cells ANTERIORLY-It communicates with the epitympanic recess through the aditus. The aditus is related medially to the ampullae of the superior and lateral semicircular canals. and posterosuperiorly to the facial canal POSTERIORLY-It is separated by a thin plate of bone from the sigmoid sinus. Beyond the sinus, there is the cerebellum MEDIALLY-Petrous temporal bone LATERALLY-It is bounded by pa of the squamous temporal bone. This pa corresponds to the suprameatal triangle seen on the surface of the bone. Ref:BDC VOLUME 3,sixth edition pg 281', 'role': 'assistant'}]