The Motor Pathways运动传导路
The Motor Pathways 运 动 传 导 路
Themotor pathways are concernedwithmotorfunction.includepyramidalsystem锥体系extrapyramidalsystem锥体外系uppermotorneuron（一）PyramidalSystemIt concerned with voluntarylowermotormovement随意运动oftheskeletalmneuronand is composed of two orders ofneurons:uppermotorneuron上运动神经元effectorlowermotorneuron下运动神经元
（一） Pyramidal System The motor pathways are concerned with motor function, include pyramidal system 锥体系 extrapyramidal system 锥体外系 It concerned with voluntary movement 随意运动of the skeletal m. and is composed of two orders of neurons: upper motor neuron 上运动神经元 lower motor neuron 下运动神经元 upper motor neuron lower motor neuron effector
UpperMotorNeuronsuppermotorneuronlieinthemotorareaof cerebral cortex.Connectdirectly orthroughinterneuronstolowermotorneuronsLower Motor Neuronsinclude cranialmotornucleiandlowermotorneuronmotorneuronsin anteriorhornofspinalcordtheiraxonsleavethe CNS andextendthough peripheral nerves to supplyskeletalmusclesThepyramidalsystemconsistsofcorticospinatract皮质脊髓束effectorcorticonucleartract皮质核束
The pyramidal system consists of corticospina tract 皮质脊髓束 corticonuclear tract 皮质核束 upper motor neuron lower motor neuron effector Upper Motor Neurons lie in the motor area of cerebral cortex, Connect directly or through interneurons to lower motor neurons, Lower Motor Neurons include cranial motor nuclei and motor neurons in anterior horn of spinal cord. their axons leave the CNS and extend though peripheral nerves to supply skeletal muscles
uppermotorneuronCorticospinaltractuppermotorneuronis theGiantpyramidalcells(Betzcells）巨大锥体细胞andotherCorticospinaltractpyramidal cells in superior2/3of precentralgyrusand ant.part of paracentrallobuleDecussation of pyramidLateral corticospinal tractAnteriorcorticospinaltractLower motorneuron
Corticospinal tract Corticospinal tract Decussation of pyramid Lateral corticospinal tract Anterior corticospinal tract upper motor neuron Lower motor neuron upper motor neuron is the Giant pyramidal cells (Betz cells) 巨大锥体细胞 and other pyramidal cells in superior 2/3 of precentral gyrus and ant. part of paracentral lobule
皮质脊髓束1.CorticospinalTractLowermotorneuronistheMotorneuronsofanteriorhornofspinalcordLateralcorticospinaltractMotorneuronsofanteriorhornAnteriorcorticospinaltract
1. Corticospinal Tract 皮质脊髓束 Motor neurons of anterior horn Lateral corticospinal tract Anterior corticospinal tract Lower motor neuron is the Motor neurons of anterior horn of spinal cord