• CN VIII: Hearing/Balance function, Acoustic Neuroma symptoms & location.
• CN VII: Stapedius muscle function, Hyperacusis in Bell’s Palsy, Ramsay Hunt Syndrome.
• Referred Otalgia
  • Concept: Pain felt in the ear originating from outside the ear.
  • Mechanism: Convergence of sensory input from different areas onto shared pathways/nuclei in the brainstem.
  • Key Nerves Involved: CN V (dental, TMJ), CN VII (geniculate neuralgia - rare), CN IX (pharynx, tonsils), CN X (larynx, pharynx), C2/C3 (cervical spine, posterior scalp/neck issues).
• CN IX: Primary sensory supply to the middle ear (pain in Otitis Media).
  • But the main damaged nerve is CN VII
• CN V3: Tensor Tympani motor supply, Auriculotemporal sensory supply (referred pain).
• CN X: Arnold’s Nerve/Reflex.