The mnemonic
GSC
What each word stands for
- GGreater petrosal nerve, lacrimation
- SNerve to stapedius, hyperacusis
- CChorda tympani, taste on anterior two-thirds of tongue
Why it matters clinically
Loss of these functions helps localise the level of a facial nerve lesion.
Where it stops being reliable
Omits the branch to the sensory auricular area and the order along the canal.
Teaching aid, still awaiting independent review. Confirm facts in a standard source.