A patient presents with hyperacusis, loss of lacrimation and loss of taste sensation in the anterior 2/3rd of the tongue. Oedema extends up to which level of facial nerve -
The patient is presenting with : -


Hyperacusis: - Nerve to stapedius is involved.
Loss of taste sensation in anterior 2/3 of tongue → Chorda tympani is involved.
Loss of lacrimation → Greater superficial petrosal nerve is involved.


Thus, the lesion is at or proximal to geniculate ganglion.
Vertical part
Vertical part proximal to nerve to stapedius
Vertical part and beyond nerve to stapedius
Proximal to geniculate ganglion