Facial recess or the posterior sinus is bounded by:: (A) Medially by the veical pa of VII nerve, (B) Laterally by the chorda tympani, (C) Above by the fossa includis, (D) All of the above
Answer is D. Facial recess or Posterior sinus - It is a depression in the posterior wall of the middle ear. It is bounded by: Medially - Veical pa of VIII nerve Laterally - Chorda tympani Above - Fossa incudis