Assertion: motor neuron's cell body | /r/CapableOf | synapse with motor nuclei
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Source sentences:
text: The nerve cell bodies of of upper motor neuron (UMNs) lie in the precentral gyrus of the cerebral cortex and in several brainstem nuclei, their axon synapse with motor nuclei in brainstem (cranial nerve nuclei) and the spinal cord (peripheral nerve).