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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Dryness of eye is caused by injury to facial nerve at:
assistant
The correct answer is  (d) Geniculate ganglion(Ref. Cummings, 6th ed., 2606)Whenever there is injury before or at the origin of the greater superficial petrosal nerve (i.e. before or at the Geniculate ganglion) which is responsible for lacrimation there will be dry eye on the same side.Tympanic segment, Vertical segment and Chorda tympani all are beyond the geniculate ganglion.