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1、Perception&SensationArwenFlynnJonChapmanSensationSensation:ProcessbywhichourBrainreceivesstimulifromtheoutsideenvironment.PerceptionPerception:Theprocesswherebythemindinterpretsoutsidestimuli,andconstructsamentalparadigm.SensationSensationcanbeexperiencedinmanydifferentmanners.Sight,Sound,Smell
2、,Taste,andTouch.ThesearereferredasVisual,Auditory,Olfactory,Gustatory,andTactile.AuditorySoundwavestravelthroughtheair,andmakecontactwiththeeardrum.Vibratingtheeardrum,thevibrationsareinterpretedintosensationsthatthemindcanunderstand.OlfactoryTheexactnatureoftheolfactionsystemisamystery,however
3、thebasicsincludeodormoleculescomingintocontactwithreceptorslocatedintheuppernasalcavity,thestimuliisthensenttothebrainwhereitisprocessed.GustatoryFourBasicsensationsareencompassedwithintaste.TheseareSweet,Sour,Salty,andBitter.Eachtastebudcontainsaporewhichcatchesfoodchemicals.Ittakes1/10ofaseco
4、ndtoregisterthetaste.TactileTheepidermiswhichregisterstouch,isthelargestorganofthebody.ThefourmaintypesofTactilesensationare:PressureWarmthColdPainTherearefourdistinctstagesintheoverallbiologicalprocessofsight.SignalgenerationSignalmanipulation(intheretina)SignalprojectionSignalManipulation,and
5、perception(inthecortex)VisualVisualprocessLightenterstheeye,andpassesthroughthecornea.Itthencomesincontactwiththeretina,whichdoestheactuallightsensingintheeye.TherearetwotypesofcellswithintheeyeRods-primarilyconcernedwithgenerallightgathering,andvisioninlowlightconditions.Cones-handlecolorvisio
6、nanddetails.Whenlightstrikesthesespecializedcellsthereisaseriesofchemicalreactionsthattakeplace,andultimately,thelightisconvertedintoelectricalimpulses.Generally,theoutersegmentofrodsarelongandthin,whereastheoutersegmentofconesaretotheirnamesake.VisualVisualsensationisconsideredtobethemostvital
7、foreverydayfunctionofallthesenses.Morethan50%ofthecerebralcortexisdevotedtovisualprocessing.VisualPerceptionMorethanjustsensation,visualperceptionisderivingmeaningfromthesensation.HomoSignificans-meaningmakers.Intoeachexperiencewe
