Class Notes (839,112)
Canada (511,191)
Psychology (81)
PSYCH 1100 (65)


5 Pages

Course Code
PSYCH 1100
Thomas Kondzielewski

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Chapter 4 Psych Logarithmic scale: page 135 Evelyn Glennie  video on her C HEMICAL SENSES • olfaction and taste SMELL • Olfaction: sense of smell • Dysosmia: loss or impairment of sense of smell (usually for single odors) o floral o camhoirc o musky o minty o etherish • lock & key theory: odors are related to shapes of chemicals and molecules • 1000 types; in combinations > 10000 types • Pheromones: airborne chemical signal o Vomeronasal organ: sense organ for pheromones • olfactory bulb sends neuronal signals to the olfactory cortex • VNO accessory olfactory bulb and the amygdale, and hypothalamus which may explain how scents influence aggressive and mating behavior • Pheromones: • the smell of fear: collected sweat, right before a university exam, anxious sweat activities, involved in empathy. suggests that anxiety can be chemically transferred between people • figure 4.26 page 136 *Olfactory Nerve fibers Chapter 4 G USTATION • sense of taste o four taste sensations: Sweet, salt, sour, bitter o most sensitive to bitter, less to sour, salt, and least sensitive to sweet o Umami: possible fifth taste sensation; brothy taste (MSG)  tuna, cheese, soybeans • Genetic effect o PTC: phenylthiocarbamide o 70% of people = bitter o 30% of people = no taste TASTE BUDS • taste-receptor cells 500-10000 Skin senses ** SOMESTHEIC SENSE • sensations produced by skin, muscles, joints, viscera, and organs of balance • skin senses (touch): light touch, pressure, pain, cold, warmth • kinesthetic: detect body position and movement • vestibular: balance, acceleration, and position in space • Insular cortex: unites eye position information with vestibular information D YNAMIC TOUCH • touch experienced when the body is in motion; a combination of sensations from skin receptors, muscles and joints • kinesthesia: a key component in muscle PROPRIOCEPTION Chapter 4 • Charles Sherrington introduced the terms 'proruiceotion' 'interception' and 'exteroception'. • The 'exteroceptors' are the organs responsible for information from [outside] the body such as the eyes, ears, mouth, and skin. • The interoceptors then give information about the internal organs, while 'proprioception' is awareness of movement derived from muscular, tendon, and articular sources. • Such a system of classification has kept physiologists and anatomists searching for specialised nerve endings that transmit data on joint capsule and muscle tension (such as muscle spindles and Pacini corpuscles) P AIN • Visceral pain: Pain originating in internal organs • Referred pa
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