Hearing Part 2. Tuning Curve. Sensitivity of a single sensory neuron to a particular frequency of sound Two mechanisms for fine tuning of sensory neurons, Mechanical=location along the basilar membrane Electrical=natural oscillations in membrane voltage. Where are the hairs cells and
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Neurons located along the
Basilar membrane in the
Organ of Corti? That dictates
Their Tuning Curve.
Matches the innate oscillation
In membrane potential
Short delay between opening of calcium and potassium channels
Low Frequency Hair Cells
Long Delay between opening of calcium and potassium channelsInnate Characteristics
Each are transmitted separately to brain
Encoded by rate of firing and # of active neurons
The greater the amplitude of sound wave the greater distance along basilar membrane that moves—activate more hair cells and more SGNs