At the level of the facial colliculus the sulcus limitans widens into a flattened depression, the superior fovea, and in the inferior part of the fossa appears as a distinct dimple, the inferior fovea.
2.
In the superior part of the fossa the medial eminence has a width equal to that of the corresponding half of the fossa, but opposite the superior fovea it forms an elongated swelling, the " colliculus facialis ", which overlies the nucleus of the abducent nerve, and is, in part at least, produced by the internal genu of the facial nerve.
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