Lacrimation is affected when facial nerve injury is at:
(a) Geniculate ganglion(Ref. Cummings, 6th ed., 2606)Mastoid segment and Stylomastoid foramen are beyond the geniculate ganglion.Otic ganglion is for the parasympathetic supply to the parotid.
Geniculate ganglion
Mastoid segment
At Otic ganglion
At Stylomastoid foramen
Facial Nerve And Its Disorders