TB3 Lecture 3; Visual and Auditory Processing

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  • Created by: mint75
  • Created on: 30-04-15 21:09

Auditory Transduction

  • The physical stimulus is pressure waves from sound.
  • Auditory transduction is a mechanical process as it relies on the orientation of the hair cells.
  • The receptor signal generated is a graded potential.
  • The stimulus encoded is frequency and loudness.
  • The sensory output is an action potential.
  • The thalamic (thalamus) target is the medial geniculate nucleus. (MGN)
  • Cortical mapping is tonotopic.
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Visual Transduction

  • The physical stimulus in visual transduction is the light photons.
  • Visual trandsuction is a photochemical process as it relies on hyperpolarisation follwing gluamate release in cells.
  • The receptor signal is a graded potential.
  • The stimulus that is being encoded is position and brightness.
  • The sensory output to the CNS is a action potential.
  • The thalamic (thalamus) target is the lateral geniculate nucleus (LGN).
  • Cortical mapping in Visual processing is retinotopic.
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