Auditory Pathway

  • External ear canal
  • Tympanic membrane
  • Malleus
  • Incus
  • Stapes
  • Cochlea with hair cells, which are transducer cells
    • Separated into compartments by the basilar and Reissner’s membranes
  • Auditory nerve

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  • 1st order neuron – Spiral ganglia
  • 2nd order neuron – cochlear nuclei



Wave ICN VIII1.9 msec
Wave IICochlear Nucleus3.0 msecMedulla
Wave IIISuperior Olivary Complex4.1 msecPons
Wave IVLateral Lemniscus5.2 msecPons
Wave VInferior Colliculus5.9 msecMidbrain
Wave VIMedial Geniculate7.6 msec
Wave VIIAuditory Radiations9.2 msec



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