【精品ppt】运动传导路1

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1、TheMotorPathways运动传导路（一）PyramidalSystem锥体系Themotorpathwaysareconcernedwithmotorfunction,includepyramidalsystem锥体系extrapyramidalsystem锥体外系Itconcernedwithvoluntarymovement随意运动oftheskeletalm.andiscomposedoftwoordersofneurons:uppermotorneuron上运动神经元lowermotorneuron下运动神经元uppermotorneuro

2、nlowermotorneuroneffectorThepyramidalsystemconsistsofcorticospinatract皮质脊髓束corticonucleartract皮质核束uppermotorneuronlowermotorneuroneffectorUpperMotorNeuronslieinthemotorareaofcerebralcortex,Connectdirectlyorthroughinterneuronstolowermotorneurons,LowerMotorNeuronsincludecranialmotor

3、nucleiandmotorneuronsinanteriorhornofspinalcord.theiraxonsleavetheCNSandextendthoughperipheralnervestosupplyskeletalmusclesCorticospinaltractCorticospinaltractDecussationofpyramidLateralcorticospinaltractAnteriorcorticospinaltractuppermotorneuronLowermotorneuronuppermotorneuronist

4、heGiantpyramidalcells(Betzcells)巨大锥体细胞andotherpyramidalcellsinsuperior2/3ofprecentralgyrusandant.partofparacentrallobule1.CorticospinalTract皮质脊髓束MotorneuronsofanteriorhornLateralcorticospinaltractAnteriorcorticospinaltractLowermotorneuronistheMotorneuronsofanteriorhornofspinalcord

5、2.CorticonuclearTract皮质核束Giantpyramidalcellsandotherpyramidalcellsinlower1/3ofprecentralgyrusGenuofinternalcapsuleBrainstemCranialnervesCranialmotorneuclei脑神经运动核uppermotorneuronlowermotorneuronSkeletalm.ofthehead,neckandface.CorticonuclearTractBilateral：nucleusofoculomotorn.,nucle

6、ustrochlearn.,motornucleusoftrigeminaln.,nucleusofabducentn.ambiguusnucleus,nucleusofaccessoryn.superiorpartoffacialnucleus.TheCorticonucleartractsendoutfiberstoendContralateral:inferiorpartoffacialnucleus面神经核下半hypoglossalnucleus舌下神经核.facialnucleushypoglossalnucleusCorticonucleart

7、racthypoglossalnucleusandinferiorpartoffacialnucleusreceiveonlythefibersfromthecontralateralcorticonuclealtract.facialnucleushypoglossalnucleusTheinjuryoftheunilateralcorticonucleartractcanusuallycausetheparalysisofthecontralateralglossalm.andfacialm.belowthepalpebralfissure.Thepa

8、ralysiscausedbytheinjuryoftheuppe