The development of nerve-muscle junctions in Rana catesbeiana tadpoles☆
[摘要] Thephysiologicalpropertiesofdevelopingnerve-musclejunctionsinRanacatesbeianatadpolesaredescribed.Developingneuronsatdifferentstagesofontogenyformedfunctionalsynapticconnectionswithasectionoftailmuscleimplantedinplaceofthehindlimbbud.Transmissionisquantalinnature,sensitiveinnormalwaystocalciumandmagnesiumconcentrations,andconformstoaPoissondistribution.Thequantalcontentisinitiallylowandincreaseswithdevelopment.Mepp'soccurrandomlyandhavelowfrequencieswhichincreaseslightlywithdevelopment.Thesizeofasinglequantumoftransmitterdoesnotchangeduringdevelopment.Themusclefibersaremultiplyinnervated,resultinginEpp'swithdistinctpeaksandcomplexskewedmeppamplitudehistograms.Nosignificantincreaseswereobservedinthelevelofdifferentiationofthedevelopingmotorneuronsasaresultoftheirhavinginnervatedaportionofmaturetailmuscle.Thenumbersofdevelopingmotorneuronsincreasedintheexperimentallateralmotorcolumn,andalagintheirmaturitywasobservedrelativetomotorneuronsinthecontrollateralmotorcolumn.
[发布日期] [发布机构]
[效力级别] [学科分类] 生物科学（综合）
[关键词] [时效性]
