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aud_07_reader-1 - Review voltages and channels because we...

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Needed Physics Concepts Speed of sound – time Æ distance Doppler Shift - bats Physics of sound – mechanical waves Filtering – sound traveling down a tube Graphing sound Time waveform Spectrograph Frequency modulation Frequency bandwidth intensity Fourier Transform Harmonics Shearing Review voltages and channels because we are going to go over complex oscillations due to opening and closing of channels
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Anatomy Divergence Convergence Parallel and hierarchical organization
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Central auditory pathways – structure and anatomy 1) There is massive divergence in the brainstem where the information from the cochlea is spread out over > 12 regions (not all shown). Divergence – 1 Æ many Convergence – many Æ 1 cochlea aud. nerve DCN AVCN PVCN Brain Stem IC MGBv MGBm MGBd A1 midbrain thalamus cortex Other cortex Other cortex Parallel & hierarchical 2) Then there is massive convergence onto the inferior colliculus (IC) through which all information must pass. 3) Then in cortex there is parallel and hierarchical connectivity reminiscent of the visual system
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