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- W2148084079 abstract "Theintegrationoftwoneuralpathwaysgenerateslearnedsonginzebrafinches.Thevocalmotorpathway(VMP)isadirectconnection betweenHVC(propername)andtherobustnucleusofthearcopallium(RA),whereastheanteriorforebrainpathway(AFP)comprisesan indirectcircuitfromHVCtoRAthattraversesthebasalganglia.Partialablation(microlesion)ofHVCinadultbirdsalterstheintegration ofVMPandAFPsynapticinputwithinRAanddestabilizessinging.However,thevocalpatternshowssurprisingresiliencebecausebirds subsequently recover their song in 1 week. Here, we show that deafening prevents vocal recovery after HVC microlesions, indicating that birds require auditory feedback to restore/relearn their vocal patterns. We then tested the role of the AFP (basal ganglia circuit) in this feedback-based recovery by ablating the output nucleus of the AFP [lateral magnocellular nucleus of the anterior nidopallium (LMAN)].WefoundthatLMANablationafterHVCmicrolesionsinducedasuddenrecoveryofthevocalpattern.Thus,theAFPcannotbe the neural locus of an instructive/learning mechanism that uses auditory feedback to guide vocal recovery, at least in this form of adult vocal plasticity. Instead, the AFP appears to be the source of the variable motor patterns responsible for vocal destabilization. In part, auditoryfeedbackmayrestoresongbystrengtheningtheVMPcomponentofsynapticinputtoRArelativetotheAFPcomponent." @default.
- W2148084079 created "2016-06-24" @default.
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- W2148084079 date "2007-01-01" @default.
- W2148084079 modified "2023-09-27" @default.
- W2148084079 title "Auditory-DependentVocalRecoveryinAdultMaleZebra FinchesIsFacilitatedbyLesionofaForebrainPathwayThat IncludestheBasalGanglia" @default.
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