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.