<prompt> Which of the following does not contribute to the boundaries of facial recess?Facial nerveStapedius tendonChorda tympani nerveShort process of incus bone  <response>: Ans. b. Stapedius tendon Ref: Dhingra 5e p6Facial recess or the posterior sinus is a depression in the posterior wall lateral to the pyramid. It is bounded medially by the vertical part of Vllth nerve, laterally by the chorda tympani and above, by the fossa incudis. Surgically, facial recess is important, as direct access can be made through this into middle ear without disturbing posterior canal wall.- Dhingra 5e p6. Boundaries of Facial RecessMedially Vertical part of Vllth nerveQLaterally Chorda tympaniQAbove Fossa incudisQ 