fundies-ch8rev - CHAPTER 8 Peripheral Auditory Nervous...

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CHAPTER 8 Peripheral Auditory Nervous System and Haircells
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IHC Synapses
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OHC Synapses Efferents have greater surface area than afferents
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Transduction- Inner Hair Cells are the true sensory transducers, converting motion of stereocilia into neurotransmitter release. Mechanical Electro-chemical Outer Hair Cells have both forward and reverse transduction-- Mechanical Electro-chemical Mechanical Electro-chemical
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Sensory Physiology The basic unit of the nervous system is the Neuron or nerve cell Neurons undergo voltage changes- SPONTANEOUSLY IN RESPONSE TO STIMULATION
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The Neuron Dendrites receive synaptic stimulation (neurotrans.) Action Potential generated in soma near axon AP conducted along axon from Node to Node (saltatory conduction) AP produces release of neurotransmitter at terminal boutons
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Two Descriptors for Neurons Afferent (sensory)-- carrying signals toward the brain Efferent (motor) -- carrying signals from brain to periphery
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Afferent Afferent & Efferent Neurons
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fundies-ch8rev - CHAPTER 8 Peripheral Auditory Nervous...

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