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Figure 9 The output of a computational model of the auditory periphery indicating the neural code of the vowel /e/ that flows to the auditory brain stem. Each line represents the aggregate neural response of fibers tuned to the same frequency. Concentration of activity in the vertical direction represents the spectral code for hearing and structure in the horizontal direction represents the temporal code. The model simulates the actions of the outer ear and middle ears, the inner ear, and the auditory nerve.

Figure 9 The output of a computational model of the auditory periphery indicating the neural code of the vowel /e/ that flows to the auditory brain stem. Each line represents the aggregate neural response of fibers tuned to the same frequency. Concentration of activity in the vertical direction represents the spectral code for hearing and structure in the horizontal direction represents the temporal code. The model simulates the actions of the outer ear and middle ears, the inner ear, and the auditory nerve.

being the major auditory cortical center. As elsewhere in the auditory central nervous system, there is a rich array of fiber types and physiological responses in the cortex. Often, cortical neurons will only respond to particular stimulus waveforms (e.g., to a complex sound but not to a pure tone). However, with the exception of the barn owl and bat, the auditory function of different parts of the auditory cortex has not been well established. There is evidence that, like at the level of the IC, cortical neurons, perhaps organized in columns, are tuned to the amplitude modulation pattern. There is also evidence for auditory spatial maps in the auditory cortex.

The central auditory nervous system is a complicated system of many neural centers and countless number of interconnections that are organized in complex ways. It has been argued that the crucial information for hearing must be computed from the neural code provided by the auditory periphery, and the complexity of the central auditory nervous system represents the hardware for this computation.

Adult Dyslexia

Adult Dyslexia

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