PSYC 211 Chapter Notes - Chapter 7-11: Secondary Somatosensory Cortex, Cochlear Nerve, Nucleus Raphe Magnus
8 Sep 2016
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Chapter 7: audition, the body sense and the chemical senses. The value of verbal communication and acoustic stimuli provide information about things cannot be seen. Might be even more important than vision. Objects vibrate motion of molecules of air sound. Receptor cells in human ears are able to detect the range of vibration: 30 - 20,000 vibrations per second. I. e. the degree to which the condensations are o o o o rarefactions of air differ from each other: more vigorous vibrations more intense sound waves louder. The acoustic system analyze the incoming vibrations (pitch x loudness x timbre) Sound is funnelled via the pinna (external ear) through the ear canal to the tympanic membrane (eardrum), which vibrates with the sound. Middle ear consists of a hollow region begin the tympanic membrane (volume: 2ml). o. Malleus (hammer) connects to tympanic membrane ii. iii. Stapes (stirrup) connects to oval window o. Ossicles cochlea (via oval window) o.
