TB3 Lecture 3; Visual and Auditory Processing

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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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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