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1、Perception&SensationArwenFlynnJonChapmanSensationSensation:ProcessbywhichourBrainreceivesstimulifromtheoutsideenvironment.PerceptionPerception:Theprocesswherebythemindinterpretsoutsidestimuli,andconstructsamentalparadigm.SensationSensationcanbeexperienced
2、inmanydifferentmanners.Sight,Sound,Smell,Taste,andTouch.ThesearereferredasVisual,Auditory,Olfactory,Gustatory,andTactile.AuditorySoundwavestravelthroughtheair,andmakecontactwiththeeardrum.Vibratingtheeardrum,thevibrationsareinterpretedintosensationsthatth
3、emindcanunderstand.OlfactoryTheexactnatureoftheolfactionsystemisamystery,howeverthebasicsincludeodormoleculescomingintocontactwithreceptorslocatedintheuppernasalcavity,thestimuliisthensenttothebrainwhereitisprocessed.GustatoryFourBasicsensationsareencompa
4、ssedwithintaste.TheseareSweet,Sour,Salty,andBitter.Eachtastebudcontainsaporewhichcatchesfoodchemicals.Ittakes1/10ofasecondtoregisterthetaste.TactileTheepidermiswhichregisterstouch,isthelargestorganofthebody.ThefourmaintypesofTactilesensationare:PressureWa
5、rmthColdPainTherearefourdistinctstagesintheoverallbiologicalprocessofsight.SignalgenerationSignalmanipulation(intheretina)SignalprojectionSignalManipulation,andperception(inthecortex)VisualVisualprocessLightenterstheeye,andpassesthroughthecornea.Itthencom
6、esincontactwiththeretina,whichdoestheactuallightsensingintheeye.TherearetwotypesofcellswithintheeyeRods-primarilyconcernedwithgenerallightgathering,andvisioninlowlightconditions.Cones-handlecolorvisionanddetails.Whenlightstrikesthesespecializedcellstherei
7、saseriesofchemicalreactionsthattakeplace,andultimately,thelightisconvertedintoelectricalimpulses.Generally,theoutersegmentofrodsarelongandthin,whereastheoutersegmentofconesaretotheirnamesake.VisualVisualsensationisconsideredtobethemostvitalforeverydayfunc
8、tionofallthesenses.Morethan50%ofthecerebralcortexisdevotedtovisualprocessing.VisualPerceptionMorethanjustsensation,visualperceptionisderivingmeaningfromthesensation.HomoSignificans-meaningmakers.Intoeachexperiencewe
