motor neuron, one of various efferent nerve cells that transmit nerve impulses from the brain or from the spinal cord to muscular or glandular tissue. According to location, some kinds of motor neurons are the peripheral motor neurons and the upper motor neurons. Also called motoneuron.
The Zimmerman telegram probably had a peripheral effect on breaking the isolationist sentiment in the US in WWI. Relations with Mexico were strained already (Veracruz was occupied) but once Huerta was gone, the Mexican neutrality in the World Wa...
The American press published news of the telegram on March 1. On April 6, 1917, the United States Congress formally declared war on Germany and its allies. The story of British intelligence efforts to decipher the German code is fascinating and complicated. The Zimmermann Telegram by Barbara Tuchman recounts that story in all of its exciting detail.