NATS 1720 Lecture Notes - Lecture 10: Spiral Ganglion, Unit, Sound
23 Nov 2017
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Document Summary
Unit 4 hearing perception (physiological) and hearing. Several cues are recognised in the brain to establish loudness (related to the firing frequency, displayed below). Low threshold neurons (spiral ganglions) e t a. The neurons, called spiral ganglions, in the ear are grouped by the total firing rate they"re capable of doing. Low threshold neurons can only fire to a certain rate before the firing rate becomes saturated. This means that these neurons won"t fire above their saturation point, even if the strength of the stimulus continues to increase. Once this groups reaches its saturation point, the next group of neurons that respond to a higher stimulus strength are activated until they too reach a limit in their firing rate. Increase of spiral ganglion neuron firing rate (active: types of neurons that are active (different types of neurons react to different strengths of stimuli, level of activity of neighbouring neurons (close to maximally active ones)
