PSYC 211 Lecture Notes - Lecture 9: Bottle Cap, Subcutaneous Tissue, Dorsal Root Ganglion

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The stimulus: sounds are vibrations of air molecules that are produced by objects, sound has three physical dimensions: If the vibration ranges between 30 and 20,000 times per second, it stimulates receptor cells in the ear: the pitch determines the frequency of the molecular vibrations. It is a long coiled tube structure vibrations. Anatomy of the ear: the timbre corresponds to the complexity of the sound. Provides information to the nature of the sound (i. e. train"s steam whistle: unlike the eye, the ear does not mix sound waves that enter the ear; what you hear is two original tones. These vibrations are transferred to the middle ear containing uid. Cross section through cochlea: the cochlea is divided into three longitudinal divisions: scala vesibuli, scala media and scala tympani, the receptive organ is the organ of corti. This bending of the cilia produces receptor potentials. This minimizes the distance between the synapse and the axon.

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