L10_NPB_101

L10_NPB_101 - Lecture10 OnlineHandouts: Lec10Notes Review...

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Unformatted text preview: Lecture10 OnlineHandouts: Lec10Notes Review SensorySystems TheEar Announcements: Ifyouhavenotbeenaddedto theclassbyMonday(4/13) seeDebbieAbboEPoarchin 188Briggs(oremailat dsabboE@ucdavis.edu)fora PTA. LastDaytoAddTuesday4/15 Auditorysystem VesXbularsystem Reading(Recommended): Ch6(pg.208221) REV:SensoryIntegraXon 1. ModalityortypeofsensoryinformaXon 2. Receptortype 3. APfiringrateofafferentproporXonalto sXmulusintensity 4. RateofreceptoradaptaXon 5. Numberofafferentsfiring 6. Receptordensity/Receptorfieldsize 7. LateralinhibiXon 8. Labeledlinecoding REV:EarAuditory Fig.630,pg.210 TransmissionofSoundWaves Fig.634bc,pg.214 SoundTransducXon hEp://www.rockefeller.edu/labheads/hudspeth/graphicalSimulaXons.php AuditoryReceptors Fig.635,pg.215 HairCells Stereocilia Hair Cell Fig.637,pg.217 InhibiXon Res$ngFR ExcitaXon + Kinocilia SoundTransducXon Fig.636,pg.216 EarVesXbular Fig.630,pg.210 VesXbularEquilibrium VesXbularapparatusandreceptors Ininnerear Consistsof2classesofreceptors Semicircularcanals(3orthogonallyorientedcanalsperside) DetectrotaXonalacceleraXonordeceleraXoninanydirecXon Otolithorgans(2Macularreceptorsatrightanglesperside: utricleandsaccule) DetectlinearacceleraXonordeceleraXon DetectchangesinrateoflinearmovementinanydirecXon ProvideinformaXonimportantfordeterminingheadposiXon inrelaXontogravity Equilibrium Neuralsignalsgeneratedinresponseto mechanicaldeformaXonofhaircellsby specificmovementoffluidandrelated structures VesXbularinputgoestovesXbularnucleiin brainstemandtocerebellumforusein maintainingbalanceandposture,controlling eyemovement,perceivingmoXonand orientaXon VesXbule Fig.638a,pg.219 SemicircularCanals Theseoperatejustlike theauditoryhaircells TheXpsareembedded inagelaXnousmass calledthecupula Movementoffluid withinthecanalpushes againstthecupula, causesthehaircell bundletobend Fig.639b,pg.220 HairCellReceptors heresponseissimilartothatinauditoryhaircells T tereociliabendingtowardthekinocilium:DepolarizaXon S tereociliabendingawayfromthekinocilium:HyperpolarizaXon S Fig.638cd,pg.219 SemicircularCanals Haircellbundlesare alignedinmirrored orientaXon RotaXondepolarizes onesetofhaircellsand hyperpolarizesthehair cellsintheopposite semicircularcanal Fig.639a,pg.220 OtolithOrgans(macularreceptors) Fig.640a,pg.221 LinearAcceleraXon Fig.640bc,pg.221 VesXbularInputOutputRelaXons Fig.641,pg.222 ...
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