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- Upper_motor_neuron abstract "Upper motor neurons are motor neurons that originate in the motor region of the cerebral cortex or the brain stem and carry motor information down to the lower motor neurons. The main effector or motor neurons (efferent neurons) for voluntary movement lie within layer V of the primary motor cortex and are a type of giant pyramidal cell called Betz cells. The cell bodies of these neurons are the largest in the brain, approaching nearly 100μm in diameter.The primary motor cortex or precentral gyrus, is one of the most important areas in the frontal lobe. The precentral gyrus is the most posterior gyrus of the frontal lobe and it lies anterior to the central sulcus. The pyramidal cells of the precentral gyrus are also called upper motor neurons. The fibers of the upper motor neurons project out of the precentral gyrus ending in the brainstem, where they will decussate (intersect) within the lower medulla oblongata to form the lateral corticospinal tract on each side of the spinal cord. The fibers that do not decussate will pass through the medulla and continue on to form the anterior corticospinal tracts. The upper motor neuron descends in the spinal cord to the level of the appropriate spinal nerve root. At this point, the upper motor neuron synapses with the lower motor neuron, each of whose axons innervating a fiber of skeletal muscle.These neurons connect the brain to the appropriate level in the spinal cord, from which point nerve signals continue to the muscles by means of the lower motor neurons. The neurotransmitter, glutamate transmits the nerve impulses from upper to lower motor neurons where it is detected by glutamatergic receptors.".
- Upper_motor_neuron thumbnail Gray764.png?width=300.
- Upper_motor_neuron wikiPageID "1880464".
- Upper_motor_neuron wikiPageRevisionID "596695438".
- Upper_motor_neuron caption "The motor tract".
- Upper_motor_neuron dorlands "five/000067688".
- Upper_motor_neuron dorlandsid "motoneuron".
- Upper_motor_neuron hasPhotoCollection Upper_motor_neuron.
- Upper_motor_neuron name "Upper motor neuron".
- Upper_motor_neuron wordnet_type synset-human_body-noun-1.
- Upper_motor_neuron subject Category:Cerebral_palsy_types.
- Upper_motor_neuron subject Category:Efferent_neurons.
- Upper_motor_neuron subject Category:Motor_system.
- Upper_motor_neuron type Abstraction100002137.
- Upper_motor_neuron type Anatomy106057539.
- Upper_motor_neuron type Biology106037666.
- Upper_motor_neuron type Cognition100023271.
- Upper_motor_neuron type Content105809192.
- Upper_motor_neuron type Discipline105996646.
- Upper_motor_neuron type KnowledgeDomain105999266.
- Upper_motor_neuron type LifeScience106037298.
- Upper_motor_neuron type Morphology106078327.
- Upper_motor_neuron type NaturalScience106000400.
- Upper_motor_neuron type PsychologicalFeature100023100.
- Upper_motor_neuron type Science105999797.
- Upper_motor_neuron type AnatomicalStructure.
- Upper_motor_neuron type AnimalBodyPart.
- Upper_motor_neuron type BiologicalObject.
- Upper_motor_neuron comment "Upper motor neurons are motor neurons that originate in the motor region of the cerebral cortex or the brain stem and carry motor information down to the lower motor neurons. The main effector or motor neurons (efferent neurons) for voluntary movement lie within layer V of the primary motor cortex and are a type of giant pyramidal cell called Betz cells.".
- Upper_motor_neuron label "Neurone motorio superiore".
- Upper_motor_neuron label "Upper motor neuron".
- Upper_motor_neuron label "上位運動ニューロン".
- Upper_motor_neuron sameAs Neurone_motorio_superiore.
- Upper_motor_neuron sameAs 上位運動ニューロン.
- Upper_motor_neuron sameAs m.0638x6.
- Upper_motor_neuron sameAs Q3875059.
- Upper_motor_neuron sameAs Q3875059.
- Upper_motor_neuron sameAs Upper_motor_neuron.
- Upper_motor_neuron wasDerivedFrom Upper_motor_neuron?oldid=596695438.
- Upper_motor_neuron depiction Gray764.png.
- Upper_motor_neuron isPrimaryTopicOf Upper_motor_neuron.
- Upper_motor_neuron name "Upper motor neuron".