QS Study

The auditory pathway conveys the special sense of hearing. This pathway ultimately reaches the primary auditory cortex for conscious perception.

There are two main components of the auditory pathway:

  • Primary (lemniscal) pathway – this is the main pathway through which auditory information reaches the primary auditory cortex.
  • Non-lemniscal pathway – mediating unconscious perception such as attention, emotional response, and auditory reflexes.

Trace the auditory pathway –

  • Sound Source,
  • Passes to the ear,
  • Vibrates tympanic membrane,
  • It is converted into bony vibration,
  • Reaches the footplate of the stapes,
  • Bony vibration is converted into liquid vibration,
  • Passes through perilymph,
  • Endolymph,

Auditory pathway in the brain 1

Fig – Auditory pathway in the brain

  • Stimulates hair cells,
  • Spiral ganglion,
  • Cochlear division of a vestibulocochlear nerve,
  • Ventral and dorsal cochlear nuclei,
  • Most of the fibers cross the trapezoid body; it terminates in opposite superior salivary nucleus,
  • Lateral lemniscus,
  • Medial geniculate body,
  • Auditory radiation,
  • Auditory area 42 in the temporal lobe of the cerebral cortex.
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