Right temporal bone, opened. Anterolateral view
Anterior surface of petrous part of temporal bone. Facies anterior partis petrosae. AC Roof of tympanic cavity. Tegmen tympani. Thin bony plate anterolateral to the arcuate eminence. C
Arcuate eminence. Eminentia arcuata. Elevation on the anterior surface of the petrous part of the temporal bone produced by the underlying anterior semicircular canal. A C Hiatus of canal for greater petrosal nerve. Hiatus canalis n. petrosi majoris. Opening in the anterior wall of the petrous part of the temporal bone for passage of the greater petrosal nerve. A C
Hiatus of canal for lesser petrosal nerve. Hiatus canalis n. petrosi minoris. Opening in the anterior wall of the petrous temporal below the greater petrosal nerve. A C Groove for greater petrosal nerve. Sulcus n. petrosi majoris. It runs anteromedially from the hiatus to the foramen lacerum. C Groove for lesser petrosal nerve. Sulcus n. petrosi minoris. Groove for the lesser petrosal nerve, running from the respective hiatus to the foramen lacerum. C
Trigeminal impression. Impressio trigeminalis. Shallow depression in the anterior wall of the apex of the petrous part of the temporal bone. It lodges the trigeminal [[semilunar]] ganglion. C
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