PSYC 271 Chapter Notes - Chapter 7: Postcentral Gyrus, Sine Wave, Fourier Analysis

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Association cortex - bimodal neurons, start to put things together (i. e. sight and sound) Primary: input mainly from thalamic relay nuclei. Secondary: input mainly from primary and secondary cortexes within the sensory system. Association: input from more than one sensory system, usually from the secondary sensory cortex. Hierarchical organization:specificity and complexity increases w each level: sensation: detecting a stimulus, perception: understanding the stimulus. Functional segregation: distinct functional areas within a level. Parallel processing: simultaneous analysis of signals along different pathways: wont ask to define perception and sensation * Sound waves, compression of air, lower density air, etc Natural sounds are complex patterns of vibrations - made of smaller waveforms. A fourier analysis breaks natural sounds down into sine waves: pic on slide. Can tell the difference between different instruments and voices bc they have different waveforms. Amplitude - how much air is being moved - compressed air - force of the air, intensity.

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