[TA] lateral end of the internal acoustic meatus, the wall of which is formed by the thin cribriform plate of bone separating the cochlea and vestibule from the internal acoustic meatus; a transverse crest divides the fundus into two regions; in the superior region are located the facial nerve area and the superior vestibular area; in the inferior region are located the cochlear area, inferior vestibular area, and singular foramen. SYN: fundus meatus acustici interni [TA], fundus of internal auditory meatus.