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Psychology, Perception and Sensation

by: Nicole Campbell

Psychology, Perception and Sensation pscyh 1000

Marketplace > University of Missouri - Columbia > Psychlogy > pscyh 1000 > Psychology Perception and Sensation
Nicole Campbell

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Perception and Sensation Notes
Introduction to Psychology
Class Notes
psych, perception and sensation, notes, Introduction to Psych
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This 3 page Class Notes was uploaded by Nicole Campbell on Monday February 8, 2016. The Class Notes belongs to pscyh 1000 at University of Missouri - Columbia taught by Ludlam in Winter 2016. Since its upload, it has received 19 views. For similar materials see Introduction to Psychology in Psychlogy at University of Missouri - Columbia.


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Date Created: 02/08/16
Sensation and Perception Principles of Perception Face perception: faces are so important that certain brain regions appear to be dedicated to perceiving them - Fusiform gyrus o Mood, attentiveness, sex, race, age o Prosopagnosia: deficits in ability to recognize faces o Anger: easier to recognize than happy face, anger=males, happiness=females o Ethnicity Object Constancy: perceptions remain stable despite radical changes in sensory input - We can view objects as constant despite changes in size, color, shape, and lightness Hearing: audition or the auditory sense - The size and shape of sound waves activate different hair cells in the inner ear - Sound waves vary in frequency (pitch) and amplitude (loudness) - 750 mph - Soundwaves-outer ear-eardrum(ossicles)-cochlea-basilar membrane-hair cells-auditory nerve-thalamus-auditory cortex o Eardrum vibrates and shakes three bones. Three bones called ossicles. After it reaches inner ear in cochlea(auditory transduction)(filled with fluid), hair cells attached to bailar membrane in cochlea, create fluid waves that move the basilar membrane. Movement of membrane causes haircells to bend starting transduction. Electrical charged changed. Neural signals go through the rest - At base of hair cell, neurotransmitters are released to nerve fibers - Having two ears allows us to locate the source ofa sound (auditory localization - The auditory system is delicate o Your mother was right. Turn down the music Taste - Gustation or gustatory sense o Taste receptors respond to the chemical substances that produce at least five basic sensations: sweet, sour, salty, bitter, and umami (savory)  Bumps in tongue: papillae o The number and distribution of taste buds vary among individuals o Cultural taste preferences begin before birth Smell - Olfaction or olfactory sense o Receptors in the olfactory epithelium respond to chemicals (odorants) and send signals to the olfactory bulb in the brain o Then the olfactory nerve relays information to thte amygdala and cortex  Bypasses thalamus Touch - Haptic or cutaneous sense o Sensory receptors in the skin detect pressure, temperature and pain o Tactile stimulation=anything that makes contact with our skin  Receptors-spinal cord-brainstem-thalamus- somatosensory cortex - Pain: crucial but complex sense o Two types of pain transmission fibers  Fast acting A delta fibers: sharp pains(express pain, emergency)  Slow acting C fibers: dull pains (sore muscles) - Gate Control Theory of Pain o Neural gates in the spinal cord control perceptions of pain o We can reduce pain perception by  Distraction, visualizing pain as more pleasant, being rested and relaxed, and taking drugs that interfere with the neural transmission of pain or render us unconscious Extrasensory Perception - Little or no good evidence supports the intriguing idea that some people have additional sensory systems that allow them to know what other people are thinking, for example, or to predict the future, or to communicate with the dead -


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