The intratemporal facial canal has three segments. Which segment is the SHORTEST?

• A Mastoid segment
• B Tympanic segment
• C Meatal segment
• D Labyrinthine segment ✓

Explanation

The labyrinthine segment runs from the fundus of the internal auditory canal to the geniculate ganglion and measures only about 3 to 5 mm, making it the shortest and narrowest part of the canal. The tympanic segment measures about 8 to 11 mm and the mastoid segment about 13 to 20 mm, so B and A are longer. The meatal segment lies within the internal auditory canal and is not counted among the three bony canal segments.

Reference: Dhingra's Diseases of Ear, Nose and Throat, 8th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.