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About: Alpha motor neuron     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : yago:WikicatEfferentNeurons, within Data Space : dbpedia.org associated with source document(s)

Type: Thingyago:WikicatCentralNervousSystemNeuronsyago:Cell100006484yago:LivingThing100004258yago:MotorNeuron105466696yago:NerveCell105465567yago:Object100002684yago:PhysicalEntity100001930yago:SomaticCell105430628yago:Whole100003553yago:WikicatEfferentNeurons New Facet based on Instances of this Class

Alpha (α) motor neurons (also called alpha motoneurons), are large, multipolar lower motor neurons of the brainstem and spinal cord. They innervate extrafusal muscle fibers of skeletal muscle and are directly responsible for initiating their contraction. Alpha motor neurons are distinct from gamma motor neurons, which innervate intrafusal muscle fibers of muscle spindles. An alpha motor neuron and the muscle fibers it innervates is a motor unit. A motor neuron pool contains the cell bodies of all the alpha motor neurons involved in contracting a single muscle.