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What is Facial recess or the posterior sinus is bounded by - and explain in detail?
Facial recess or Posterior sinus – It is a depression in the posterior wall of the middle ear.
It is bounded by:
Medially – Vertical part of VIII nerve
Laterally – Chorda tympani
Above – Fossa incudis
Importance – This recess is important surgically, as direct access can be made through this into the middle ear without disturbing posterior canal wall. (Posterior tympanotomy approach)